Iowa population, people and households
Iowa had a population of 3,238,387 on July 1, 2025, the 20th smallest of the 50 states and DC, according to the Census Bureau's latest official estimates (Vintage 2025). Between July 2024 and July 2025 the population grew by 7,933 people (+0.25%), and the state now has 47,805 more residents than in April 2020 (+1.50%).1
Midwest region, West North Central division
In 2025 the population was 80.2% white, 7.9% Hispanic or Latino, 4.3% Black, 4.3% two or more races and 2.5% Asian (all groups other than Hispanic are non-Hispanic).2 The median age is 39.4 years3, the median household income $76,4834 and the poverty rate 11.0%5.
Other official counts of Iowa's population
| Measure | People |
|---|---|
| Population estimate, July 1, 2025 (headline) | 3,238,387 |
| Population estimate, July 1, 2024 | 3,230,454 |
| 2020 Census count, April 1, 2020 | 3,190,369 |
| Estimates base, April 1, 2020 | 3,190,582 |
| American Community Survey, 2025 1-year | 3,238,387 |
| American Community Survey, 2020–2024 5-year average | 3,210,507 |
Source: Census Bureau, Population Estimates Program, Vintage 2025; Census Bureau, 2020 Census apportionment results and historical resident population 1910-2020; Census Bureau, American Community Survey 1-year estimates, 2025, table B01003; Census Bureau, American Community Survey 5-year estimates, 2020-2024, table B01003. The July 2025 estimate is the official current figure. The census is a count at one date; the estimates carry it forward with births, deaths and migration; the ACS is a survey weighted to the estimates, so its total is shown with a margin of error (±, 90% confidence) or controlled to the estimate.
Iowa's population keeps reaching new highs, but in small steps: births still outnumber deaths, arrivals from abroad cover the net loss to other states, and most residents were born in the state. Behind the slow total sit some sharp contrasts: one of the largest shares of residents aged 85 and older alongside one of the highest fertility rates, the second-lowest rents of any state, and old Dutch, Czech and Luxembourger roots next to newer Sudanese, Burmese and Laotian communities.
Data as of October 29, 2026 (newest release used on this page).
On July 1, 2025, Iowa had 3,238,387 residents, 0.95% of the US population and the 20th smallest state. The total has risen in every annual estimate since 2000, so each new figure is a record, but the steps are small. The state added 7,933 people between July 2024 and July 2025, a growth rate of 0.25% against 0.52% for the country. In numbers, that gain was lower than every bordering state (Illinois, Minnesota, Missouri, Nebraska, South Dakota and Wisconsin)1.
Slow growth since the 2020 Census
Since the April 2020 estimates base, Iowa has gained 47,805 residents, or 1.50%. That rate is 1.6 percentage points below the US figure (3.10%) and higher than Illinois and Wisconsin; lower than Minnesota, Missouri, Nebraska and South Dakota1. Over the previous decade, 2010 to 2020, the census count grew 4.7%, 2.7 percentage points below the US figure (7.4%)6.
| State | Population | Change 2024-25 | Growth 2024-25 | Growth since 2020 |
|---|---|---|---|---|
| Iowa | 3,238,387 | 7,933 | 0.25% | 1.50% |
| Illinois | 12,719,141 | 16,108 | 0.13% | −0.80% |
| Minnesota | 5,830,405 | 33,000 | 0.57% | 2.17% |
| Missouri | 6,270,541 | 26,997 | 0.43% | 1.88% |
| Nebraska | 2,018,006 | 12,415 | 0.62% | 2.86% |
| South Dakota | 935,094 | 7,984 | 0.86% | 5.46% |
| Wisconsin | 5,972,787 | 15,619 | 0.26% | 1.33% |
| United States | 341,784,857 | 1,781,060 | 0.52% | 3.10% |
Source: Census Bureau, Population Estimates Program, Vintage 2025.
Iowa kept its 4 House seats after the 2020 apportionment (+0), and each seat represents 798,102 people, the 6th highest9 apportionment population per seat among the 50 states.
From 10th largest in 1900 to the middle of the table
The first census to count the area of present-day Iowa, in 1840, found 43,112 people. The count then climbed to 1,194,020 in 1870 and 2,231,853 in 1900, when Iowa ranked 10th of 5110 among the present-day states and DC.
Source: Census Bureau, Historical Census Statistics on Population Totals by Race, 1790 to 1990; Census Bureau, 2020 Census apportionment results and historical resident population 1910-2020; Census Bureau, Population Estimates Program, Vintage 2025. Census counts every ten years (April 1); estimates for July 1 after 2020.
Show the numbers
| Year | Iowa |
|---|---|
| 1840 | 43,112 |
| 1850 | 192,214 |
| 1860 | 674,913 |
| 1870 | 1,194,020 |
| 1880 | 1,624,615 |
| 1890 | 1,912,297 |
| 1900 | 2,231,853 |
| 1910 | 2,224,771 |
| 1920 | 2,404,021 |
| 1930 | 2,470,939 |
| 1940 | 2,538,268 |
| 1950 | 2,621,073 |
| 1960 | 2,757,537 |
| 1970 | 2,824,376 |
| 1980 | 2,913,808 |
| 1990 | 2,776,755 |
| 2000 | 2,926,324 |
| 2010 | 3,046,355 |
| 2020 | 3,190,369 |
| 2021 | 3,199,037 |
| 2022 | 3,201,890 |
| 2023 | 3,214,739 |
| 2024 | 3,230,454 |
| 2025 | 3,238,387 |
The 1910 count, 2,224,771, was lower than the 1900 count, and Iowa slipped to 15th of 51. Growth resumed, but other states grew faster: Iowa's rank fell at every census from 1910 to 1990, to 22nd of 51 in 1950 and 30th of 51 in 1990. The count reached 2,913,808 in 1980, fell to 2,776,75510 in 1990, and did not pass the 1980 level again until the 2000 Census (2,926,324). By 2020 Iowa ranked 31st of 516.
Births ahead of deaths, migrants from abroad ahead of departures
Iowa's growth since 2020 has three parts, and they pull in different directions. Between April 2020 and June 2025 the state recorded 190,875 births and 178,442 deaths, a natural increase of 12,433. Net international migration added 45,014. The balance of moves to and from other states was −10,148: Iowa is one of 24 states, plus the District of Columbia, that lost more residents to other states than they gained between April 2020 and June 20251.
| Period | Births | Deaths | Natural change | Net domestic | Net international |
|---|---|---|---|---|---|
| Apr 2020–Jun 2021 | 35,845 | 35,466 | 379 | 2,294 | 3,701 |
| Jul 2021–Jun 2022 | 36,774 | 35,685 | 1,089 | −6,301 | 9,235 |
| Jul 2022–Jun 2023 | 36,415 | 32,987 | 3,428 | −3,502 | 13,275 |
| Jul 2023–Jun 2024 | 36,280 | 32,751 | 3,529 | −427 | 12,701 |
| Jul 2024–Jun 2025 | 36,470 | 33,521 | 2,949 | −970 | 5,903 |
Source: Census Bureau, Population Estimates Program, Vintage 2025. Estimate years run from July 1 to June 30; the first covers April 1, 2020 to June 30, 2021.
The yearly pattern shows where the 2025 slowdown came from. Net international migration fell from 12,701 in the year to June 2024 to 5,903 in the year to June 2025, while the domestic balance stayed close to zero (−970). Arrivals from abroad still made up 74% of the year's population change, and natural increase 37%1; together they exceed the total because the domestic balance was negative.
Both of Iowa's vital rates are above the national ones. The birth rate in the year to June 2025 was 11.3 per 1,000 residents, 6% above the US figure (10.6 per 1,000 residents), and the death rate 10.4 per 1,000 residents, 14% above the US figure (9.1 per 1,000 residents). The gap between them leaves natural increase at 0.9 per 1,000 residents, 40% below the US figure (1.5 per 1,000 residents)1.
A state of people born in Iowa
In 2025, 68.8% of Iowa residents were born in the state, 12.4 percentage points above the US figure (56.4%). That share ranks between 4th and 7th among the states once the survey's margins of error are allowed for, and it is higher than Illinois, Minnesota, Missouri, Nebraska and South Dakota; not statistically different from Wisconsin. Of the 23.8% born in another state, most came from elsewhere in the Midwest (14.6% of all residents), against 4.3% from the West, 3.7% from the South and 1.3%11 from the Northeast.
Moved to Iowa from
Left Iowa for
Source: Census Bureau, State-to-State Migration Flows, 2024. People aged 1 and over who lived in another state a year earlier (and the reverse). Survey estimates: whiskers show the 90% margin of error.
Show the numbers
| State | Moved in from | Moved out to |
|---|---|---|
| Illinois | 10,691 ±2,090 | 6,721 ±1,744 |
| Texas | 5,861 ±2,811 | 3,755 ±1,433 |
| Minnesota | 5,086 ±1,099 | 5,965 ±1,581 |
| Nebraska | 4,800 ±1,250 | 6,626 ±1,928 |
| Wisconsin | 3,739 ±964 | 4,117 ±1,324 |
| Missouri | 3,254 ±970 | 2,421 ±738 |
| Colorado | 2,866 ±1,605 | – |
| California | 2,485 ±1,155 | – |
| Arizona | – | 4,596 ±2,154 |
| Pennsylvania | – | 3,205 ±1,713 |
| New Jersey | – | 2,427 ±1,908 |
The Census Bureau's survey of movers counted 59,199 people who moved to Iowa from another state in 2024 and 69,493 who left, a net change of −10,294. Illinois was the largest source of arrivals (10,691), statistically larger than the flow from Texas. The largest destinations were Illinois (6,721) and Nebraska (6,626); the first is not statistically different from the flow to Nebraska12.
What percent of Iowa is white, Black, Hispanic or Asian
In the 2025 American Community Survey, 80.2% of Iowans were non-Hispanic white (±0.2 percentage points), 25.2 percentage points above the US figure (55.0%). Hispanic or Latino residents of any race were 7.9%, non-Hispanic Black residents 4.3%, non-Hispanic multiracial residents 4.3% and non-Hispanic Asian residents 2.5%2.
Source: Census Bureau, American Community Survey 1-year estimates, 2025, table B03002; Census Bureau, American Community Survey 1-year estimates, 2025, table B02009. The dark bars are mutually exclusive and add to 100%. The light bars count everyone who reported the race, alone or with another race and of any ethnicity, so they overlap and add to more than 100%.
Show the numbers
| Group | Share (single group) | MOE | Alone or in combination |
|---|---|---|---|
| White, not Hispanic | 80.2% | ±0.2 | 89.8% |
| Hispanic or Latino (any race) | 7.9% | ±0.1 | – |
| Black, not Hispanic | 4.3% | ±0.2 | 6.0% |
| Two or more races, not Hispanic | 4.3% | ±0.2 | – |
| Asian, not Hispanic | 2.5% | ±0.1 | 3.4% |
| Some other race, not Hispanic | 0.4% | ±0.1 | – |
| American Indian and Alaska Native, not Hispanic | 0.2% | ±0.1 | 2.2% |
| Native Hawaiian and Pacific Islander, not Hispanic | 0.2% | ±0.1 | 0.4% |
The non-Hispanic white share is falling steadily. It was 91.5%14 in 2005 and is down from 81.2% in 20242, a statistically significant one-year drop. The Census Bureau's population estimates show the same direction since the 2020 Census: the Hispanic share was 8.1% in July 2025, up from 6.8% in 2020, and the Black alone share 4.9%, up from 4.3% in 202015. Most Hispanic Iowans are of Mexican origin (5.0% of the whole population in 2020–2024), followed by Central American origin (1.0%16).
Source: Census Bureau, American Community Survey 1-year estimates, 2005-2019 and 2021-2025. ACS 1-year estimates; no standard 1-year release for 2020. Shaded band: 90% margin of error.
Show the numbers
| Year | Iowa | United States |
|---|---|---|
| 2005 | 91.5% ±0.1 | 66.8% ±0.0 |
| 2006 | 91.0% ±0.0 | 66.2% ±0.0 |
| 2007 | 90.5% ±0.1 | 65.8% ±0.0 |
| 2008 | 90.2% ±0.1 | 65.4% ±0.0 |
| 2009 | 89.9% ±0.1 | 64.9% ±0.0 |
| 2010 | 88.6% ±0.1 | 63.7% ±0.0 |
| 2011 | 88.4% ±0.0 | 63.3% ±0.0 |
| 2012 | 88.0% ±0.1 | 62.8% ±0.0 |
| 2013 | 87.5% ±0.1 | 62.4% ±0.0 |
| 2014 | 87.1% ±0.0 | 61.9% ±0.0 |
| 2015 | 86.8% ±0.0 | 61.5% ±0.0 |
| 2016 | 86.4% ±0.1 | 61.1% ±0.0 |
| 2017 | 85.9% ±0.1 | 60.6% ±0.0 |
| 2018 | 85.4% ±0.1 | 60.2% ±0.0 |
| 2019 | 85.1% ±0.1 | 60.0% ±0.0 |
| 2021 | 83.0% ±0.2 | 58.1% ±0.0 |
| 2022 | 82.8% ±0.1 | 57.7% ±0.0 |
| 2023 | 82.4% ±0.1 | 57.1% ±0.0 |
| 2024 | 81.2% ±0.1 | 56.3% ±0.0 |
| 2025 | 80.2% ±0.2 | 55.0% ±0.0 |
Even so, Iowa remains one of the least diverse states. On the diversity index, the chance that two residents picked at random belong to different racial or ethnic groups, Iowa scores 34.6, 45% below the US figure (63.5). It is the 7th least diverse state, least diverse in the Midwest and less diverse than every bordering state (Illinois, Minnesota, Missouri, Nebraska, South Dakota and Wisconsin)17.
Source: States Demographics, Computed, table B03002. Period: 2025.
Show the numbers
| State | Diversity index |
|---|---|
| United States | 63.5 |
| Illinois | 62.6 |
| Nebraska | 45.3 |
| Minnesota | 44.9 |
| Missouri | 42.9 |
| Wisconsin | 40.1 |
| South Dakota | 38.4 |
| Iowa | 34.6 |
One small group stands out: Native Hawaiian and Other Pacific Islander residents are 0.4% of the population, the 9th highest share and highest in the Midwest15. The section on newer communities below shows which groups make up that figure. Searches also ask what share of Iowa is Catholic or Muslim; the federal sources used on this site do not include religion, so this page has no figure for it.
Rural Iowa and the land
At the 2020 Census, 36.9% of Iowans lived in rural areas, 16.9 percentage points above the US figure (20.0%). That is the 13th highest rural share and higher than Illinois, Minnesota, Missouri, Nebraska and Wisconsin; lower than South Dakota. The other 63.1%18 lived in urban areas as the Census Bureau defines them.
Iowa covers 55,854 square miles of land; water makes up only 0.7%19 of its total area. With 58.0 people per square mile in 2025, it is 40% below the US figure (96.7 people per square mile) and denser than Nebraska and South Dakota; less dense than Illinois, Minnesota, Missouri and Wisconsin20. Housing follows the same pattern: 71.5% of homes are single-family detached houses (10.6 percentage points above the US figure (60.9%)), 7.6% are in buildings with 20 or more units (3.5 percentage points below the US figure (11.1%)21), and 76.5%22 of workers drive to work alone.
Many very old residents, and many young children
Iowa's median age, 39.4 years in 2025 (±0.2 years), is not statistically different from the US figure (39.5 years)3. The median hides an unusual shape. Residents aged 85 and older make up 2.5% of the population, tied for 4th highest among the states, highest in the Midwest and higher than every bordering state (Illinois, Minnesota, Missouri, Nebraska, South Dakota and Wisconsin). At the same time, children under 18 are 22.2%, 1.2 percentage points above the US figure (21.1%)15.
Source: Census Bureau, Population Estimates Program, Vintage 2025. Share of the total population in each age group. Vertical ticks: the United States.
Show the numbers
| Age | Men (%) | Women (%) | US men (%) | US women (%) |
|---|---|---|---|---|
| 0-4 | 2.89 | 2.79 | 2.76 | 2.65 |
| 5-9 | 3.11 | 2.97 | 2.96 | 2.83 |
| 10-14 | 3.27 | 3.13 | 3.08 | 2.95 |
| 15-19 | 3.61 | 3.38 | 3.31 | 3.16 |
| 20-24 | 3.73 | 3.48 | 3.43 | 3.28 |
| 25-29 | 3.16 | 2.90 | 3.46 | 3.37 |
| 30-34 | 3.14 | 3.02 | 3.41 | 3.38 |
| 35-39 | 3.19 | 3.10 | 3.38 | 3.40 |
| 40-44 | 3.21 | 3.08 | 3.21 | 3.27 |
| 45-49 | 2.93 | 2.84 | 2.93 | 3.03 |
| 50-54 | 2.67 | 2.64 | 2.83 | 2.96 |
| 55-59 | 2.76 | 2.77 | 2.86 | 3.02 |
| 60-64 | 3.00 | 3.16 | 2.96 | 3.21 |
| 65-69 | 2.93 | 3.14 | 2.75 | 3.08 |
| 70-74 | 2.50 | 2.73 | 2.26 | 2.64 |
| 75-79 | 1.79 | 2.09 | 1.71 | 2.08 |
| 80-84 | 1.04 | 1.36 | 1.00 | 1.32 |
| 85+ | 0.91 | 1.57 | 0.78 | 1.28 |
With large groups at both ends, the working-age share is small. People aged 18 to 64 are 57.7% of the population, a share tied for 4th lowest among the states. The total dependency ratio, children and residents 65 and older per 100 people of working age, is 73.3, tied for 4th highest. The balance is shifting toward the older end: Iowa had 649,656 residents aged 65 and older in July 2025, up from 577,557 in 2020, and 719,648 children, down from 740,568 in 202015.
Births per woman are well above the national level. The total fertility rate, the average number of births per woman at 2024 rates, was 1.80, 12% above the US figure (1.60) and tied for 5th highest among the states. The difference is largest among women in their late twenties: 123.0 per 1,000 women aged 25 to 29, 37% above the US figure (89.5 per 1,000 women aged 25 to 29)23.
Source: CDC National Center for Health Statistics, Births. Period: 2024.
Show the numbers
| State | Births per woman |
|---|---|
| South Dakota | 2.04 |
| Nebraska | 1.92 |
| Idaho | 1.82 |
| North Dakota | 1.81 |
| Iowa | 1.80 |
| Utah | 1.80 |
| Kentucky | 1.80 |
| Alaska | 1.80 |
| Kansas | 1.77 |
| Indiana | 1.77 |
Lower incomes, lower prices and the second-lowest rent
The median household income in Iowa was $76,483 in 2025 (±$958), $8,297 (10%) below the US figure ($84,780); it is not statistically different from $77,488 in 2024 (in 2025 dollars)4. Per capita personal income, the Bureau of Economic Analysis measure that includes all sources of income, was $67,321 in 2025, lower than every bordering state (Illinois, Minnesota, Missouri, Nebraska, South Dakota and Wisconsin)24.
Prices change the picture. The BEA's regional price parity for Iowa was 87.8 in 2024 (US = 100), 12% below the US figure (100.0) and tied for 3rd least expensive in the country. Goods cost 6% below the US figure (99.6), less expensive than every bordering state (Illinois, Minnesota, Missouri, Nebraska, South Dakota and Wisconsin), and other services were the 3rd least expensive of any state. Adjusted for those prices, per capita income was $60,144, $949 (2%) above the US figure ($59,195)25.
| State | Median household income | Per capita personal income | Real per capita income | Price level (US = 100) | Goods | Median gross rent | Median home value (owner-occupied) | Poverty rate | SPM rate |
|---|---|---|---|---|---|---|---|---|---|
| Iowa | $76,483 ±$958 | $67,321 | $60,144 | 87.8 | 93.7 | $1,026 ±$18 | $237,000 ±$2,264 | 11.0% ±0.5 | 8.3% ±1.1 |
| Illinois | $86,676 ±$814 | $78,987 | $60,333 | 100.0 | 103.8 | $1,419 ±$17 | $294,400 ±$1,931 | 11.5% ±0.3 | 11.6% ±0.9 |
| Minnesota | $92,297 ±$1,085 | $78,197 | $62,039 | 98.6 | 100.5 | $1,357 ±$17 | $353,800 ±$2,300 | 9.0% ±0.4 | 7.9% ±1.0 |
| Missouri | $75,485 ±$937 | $69,836 | $57,850 | 90.8 | 96.3 | $1,142 ±$15 | $271,400 ±$2,495 | 11.5% ±0.4 | 9.4% ±1.3 |
| Nebraska | $81,614 ±$1,319 | $76,055 | $65,297 | 90.1 | 94.1 | $1,194 ±$20 | $279,200 ±$3,160 | 10.2% ±0.7 | 7.5% ±1.0 |
| South Dakota | $80,506 ±$1,946 | $78,999 | $69,153 | 88.6 | 95.5 | $1,089 ±$33 | $299,100 ±$6,467 | 11.8% ±0.9 | 8.0% ±1.1 |
| Wisconsin | $80,213 ±$703 | $71,219 | $58,273 | 94.1 | 94.3 | $1,219 ±$12 | $316,500 ±$2,156 | 10.3% ±0.4 | 7.9% ±1.2 |
| United States | $84,780 ±$215 | $77,028 | $59,195 | 100.0 | 99.6 | $1,557 ±$4 | $371,100 ±$646 | 11.8% ±0.1 | 13.0% ±0.2 |
Source: Census Bureau, American Community Survey 1-year estimates, 2025, table B19013; BEA, SAINC1 State annual personal income summary; BEA, SARPP Regional Price Parities by state; Census Bureau, American Community Survey 1-year estimates, 2025, table B25064; Census Bureau, American Community Survey 1-year estimates, 2025, table B25077; Census Bureau, American Community Survey 1-year estimates, 2025, table B17001; Census Bureau, Poverty in the United States. ± is the 90% margin of error.
Housing is where the gap is widest. The median gross rent, $1,026 a month in 2025 (±$18), is $531 (34%) below the US figure ($1,557); only West Virginia ($92126) had a lower median. The median home value, $237,000, is $134,100 (36%) below the US figure ($371,100)27, and 71.4% of households own their home, 6.1 percentage points above the US figure (65.3%)29. Low rents do not mean low burdens for every renter: 46.5% of renting households spent at least three-tenths of their income on housing, up from 43.2% in 202430.
Source: Census Bureau, American Community Survey 1-year estimates, 2025, table B25064. Whiskers show the 90% margin of error; states whose whiskers overlap may not differ significantly. Period: 2025.
Show the numbers
| State | Median gross rent | MOE |
|---|---|---|
| Oklahoma | $1,107 | ±$11 |
| Louisiana | $1,105 | ±$15 |
| South Dakota | $1,089 | ±$33 |
| Wyoming | $1,087 | ±$57 |
| Kentucky | $1,072 | ±$16 |
| North Dakota | $1,071 | ±$32 |
| Arkansas | $1,055 | ±$20 |
| Mississippi | $1,033 | ±$26 |
| Iowa | $1,026 | ±$18 |
| West Virginia | $921 | ±$22 |
The official poverty rate was 11.0% in 2025 (±0.5 percentage points), 0.8 percentage points below the US figure (11.8%). Child poverty was 11.9%, down from 13.6% in 2024, while poverty among residents 65 and older was 10.1%, up from 8.3% in 20245. The Supplemental Poverty Measure, which counts benefits and local housing costs, averaged 8.3% over 2023–2025, 4.7 percentage points below the US figure (13.0%)28.
The only state where Mainline Protestants lead
Iowa is the one state where Mainline Protestant churches form the largest religious tradition. In the 2020 U.S. Religion Census they counted 15.7% of residents, the 3rd highest share, just ahead of Catholic parishes (14.7%). The Catholic Church is still the largest single body; the Evangelical Lutheran Church in America (5.8%) and The United Methodist Church (5.4%, with 73531 congregations) follow.
| Tradition | Adherents | Share of residents | US share | Share of adherents |
|---|---|---|---|---|
| Mainline Protestant | 501,643 | 15.7% | 5.2% | 35.0% |
| Catholic | 470,487 | 14.7% | 18.7% | 32.9% |
| Evangelical Protestant | 352,568 | 11.1% | 16.5% | 24.6% |
| Other traditions | 79,722 | 2.5% | 5.7% | 5.6% |
| Black Protestant | 23,713 | 0.74% | 2.2% | 1.7% |
| Orthodox Christian | 3,216 | 0.10% | 0.35% | 0.22% |
| All adherents | 1,431,349 | 44.9% | 48.6% | 100% |
Source: Association of Religion Data Archives (ARDA), U.S. Religion Census. Traditions as classified by the ARDA (Steensland et al. scheme; "Other" includes Latter-day Saints, Jehovah's Witnesses, Jewish, Muslim, Hindu and Buddhist groups). Adherents are counted by religious bodies for their congregations (members, children and others who take part, as each body defines them), not a survey of what people believe; some bodies did not take part or were estimated, and one person can be counted by more than one body. Shares use the 2020 Census population.
The mosque study estimated 23,211 people taking part in Iowa's mosques (0.73%). Iowa's overall adherence rate, 44.9%, is lower than every bordering state (Illinois, Minnesota, Missouri, Nebraska, South Dakota and Wisconsin)31, and it fell from 53.9%32 in the 2010 study. The counts come from congregations and are not a survey of belief; see religion across the states.
Luxembourger, Dutch and Czech roots
German is by far the most common ancestry in Iowa: 914,217 people, 28.2%33 of residents in 2025, the 5th highest share in the 2020–2024 estimates. Several smaller European ancestries are more concentrated here than almost anywhere. In the 2020–2024 survey, Iowa had the highest share of residents reporting Luxembourger ancestry (0.16%, ahead of Wisconsin at 0.11%), the 3rd highest Dutch share, the 3rd highest Czech share and the 5th highest34 Danish share.
| German | 914,217 ±17,413 | 28.2% | 2025 | high |
|---|---|---|---|---|
| Irish | 374,543 ±14,019 | 11.6% | 2025 | high |
| English | 302,213 ±12,022 | 9.3% | 2025 | high |
| Norwegian | 123,370 ±7,427 | 3.8% | 2025 | high |
| Dutch | 102,019 ±8,064 | 3.2% | 2025 | high |
| Swedish | 60,651 ±4,555 | 1.9% | 2025 | high |
| Danish | 41,453 ±3,598 | 1.3% | 2025 | high |
| Czech | 39,520 ±4,259 | 1.2% | 2025 | high |
| Luxembourger | 3,529 ±921 | 0.11% | 2025 | medium |
| Yugoslavian | 7,890 ±2,446 | 0.24% | 2025 | medium |
| Sudanese | 6,628 ±1,251 | 0.21% | 2020–2024 | high |
| Liberian | 6,816 ±3,198 | 0.21% | 2025 | medium |
Source: Census Bureau, American Community Survey 1-year estimates, 2025, table B04006; Census Bureau, American Community Survey 5-year estimates, 2020-2024, table B04006. Share of the total population. Each row uses the ACS 2025 1-year estimate where it is published with a coefficient of variation of 30% or less, otherwise the 2020–2024 5-year estimate. ± is the 90% margin of error; low reliability means a CV above 30%.
Ancestry is self-reported and a person can give two, so the shares overlap and do not sum to the whole population.
Sudanese, Burmese, Laotian and Pacific Islander newcomers
Iowa has a small immigrant population: 214,002 foreign-born residents in 2025, 6.6% of the total and 8.1 percentage points below the US figure (14.7%). Its origins differ from the national mix. 20.2% of Iowa's foreign-born residents were born in Africa, 14.3 percentage points above the US figure (5.9%), and 38.8% in Latin America, 11.5 percentage points below the US figure (50.3%). Only 42.8% have become US citizens, 11.1 percentage points below the US figure (53.9%)11.
Specific groups show up in the detailed tables. In the 2020–2024 estimates, Iowa and Nebraska had the highest shares of residents of Sudanese ancestry (0.21% and 0.20%), and Iowa had the highest share reporting Yugoslavian ancestry (0.21%, with Missouri at 0.20%). Liberian ancestry ranks 4th highest34 by share.
| Group | People | Share | Period | Reliability |
|---|---|---|---|---|
| Asian Indian | 16,299 ±1,713 | 0.51% | 2020–2024 | high |
| Chinese, except Taiwanese | 10,253 ±1,117 | 0.32% | 2020–2024 | high |
| Vietnamese | 8,783 ±969 | 0.27% | 2020–2024 | high |
| Burmese | 8,448 ±1,068 | 0.26% | 2020–2024 | high |
| Korean | 6,616 ±766 | 0.21% | 2020–2024 | high |
| Filipino | 6,275 ±825 | 0.20% | 2020–2024 | high |
| Laotian | 5,973 ±1,022 | 0.19% | 2020–2024 | high |
| Nepalese | 2,406 ±739 | 0.07% | 2020–2024 | medium |
Source: Census Bureau, American Community Survey 5-year estimates, 2020-2024, table B02015. Share of the total population. Each row uses the ACS 2025 1-year estimate where it is published with a coefficient of variation of 30% or less, otherwise the 2020–2024 5-year estimate. ± is the 90% margin of error; low reliability means a CV above 30%.
Among Asian groups, Asian Indians are the largest (16,299), but the groups that set Iowa apart are Laotian (5,973, the 2nd highest share after Rhode Island) and Burmese (8,448, the 4th highest35 share). The largest Pacific Islander groups come from Micronesia: 1,753 Marshallese and 836 Chuukese residents, the 5th highest and 2nd highest36 shares in the country (2020–2024, medium to high reliability).
At home, 10.2% of residents aged 5 and older speak a language other than English, most often Spanish (5.1%37). Swahili and other languages of Central, Eastern and Southern Africa are spoken by 15,576 people (0.51%), the 3rd highest share, and Serbo-Croatian by 6,54838, tied for 2nd highest39. Both 2025 estimates are of medium reliability.
Associate's degrees and high school graduation
Iowa's education profile is weighted toward the middle. 93.7% of adults aged 25 and older have finished high school (±1.0 percentage points), 3.1 percentage points above the US figure (90.6%), and public high schools graduated 90% of students on time in the 2021–22 school year, tied for 2nd highest41 in the country. 12.5% of adults hold an associate's degree as their highest degree, the 3rd highest share behind North Dakota and South Dakota40.
Source: Census Bureau, American Community Survey 1-year estimates, 2025, table B15003. Whiskers show the 90% margin of error. Period: 2025.
Show the numbers
| State | Associate's degree | MOE |
|---|---|---|
| South Dakota | 13.2% | ±0.8 |
| Iowa | 12.5% | ±0.4 |
| Minnesota | 11.8% | ±0.3 |
| Nebraska | 11.4% | ±0.5 |
| Wisconsin | 11.3% | ±0.3 |
| United States | 8.9% | |
| Illinois | 8.7% | ±0.2 |
| Missouri | 8.6% | ±0.3 |
Four-year and graduate degrees are less common. 32.6% of adults have a bachelor's degree or higher (±0.6 percentage points), 4.8 percentage points below the US figure (37.4%), and 11.1% have a graduate or professional degree, 3.9 percentage points below the US figure (15.0%)40.
Households: smaller, and many living alone
The 2025 survey counted 1,355,504 households in Iowa, with an average of 2.31 people, 7% below the US figure (2.49)43. 32.4% of households are one person living alone, 3.2 percentage points above the US figure (29.2%); the share ranks between 2nd and 12th once margins of error are allowed for. Family households are 60.9%, down from 62.0% in 202442.
Divorce is less common than in most states. Iowa's divorce rate in 2024 was 1.8 per 1,000 residents, the 5th lowest among the states that report divorces and 22% below the US figure (2.3 per 1,000 residents)44. Among people 15 and older, 52.0% are married, 2.6 percentage points above the US figure (49.4%), and 31.3% have never married, 3.5 percentage points below the US figure (34.8%)45.
Homelessness is also rare by national standards. HUD's January 2025 count found 2,816 people experiencing homelessness, 8.7 per 10,000 residents, the 6th lowest rate; the count was up 7.0% from 2,631 a year earlier, a change 10.3 percentage points above the US figure (−3.3%)46.
Health coverage, and the largest Medicaid increase
Between June 2025 and June 2026, enrollment in Medicaid and CHIP in Iowa rose 1.0%, the highest in the nation, while national enrollment changed by −5.8%. Only Missouri (0.6%) and South Dakota (0.3%) also recorded increases. In June 2026, 678,280 Iowans were enrolled, 20.9%47 of the population.
Source: CMS (Centers for Medicare & Medicaid Services), State Medicaid and CHIP Applications, Eligibility Determinations, and Enrollment Data. Period: June 2025 to June 2026.
Show the numbers
| State | Medicaid and CHIP enrollment change |
|---|---|
| Iowa | 1.0% |
| Missouri | 0.6% |
| South Dakota | 0.3% |
| Hawaii | −0.5% |
| Alabama | −0.7% |
| North Dakota | −0.8% |
| Washington | −0.9% |
| New Jersey | −1.2% |
5.7% of Iowans had no health insurance in 2025, 2.7 percentage points below the US figure (8.4%)48. Life expectancy at birth was 77.9 years in 2022, 0.4 years above the US figure (77.5 years): 75.6 years for men and 80.4 years49 for women. The age-adjusted drug overdose death rate in 2024, 13.7 per 100,000, age-adjusted, was 41% below the US figure (23.1 per 100,000, age-adjusted), and infant mortality, 4.5 per 1,000 live births, 19% below the US figure (5.5 per 1,000 live births)50.
Work, commutes and veterans
Iowa has one of the highest shares of adults in the labor force: 67.8% in 2025, a rate tied for 7th highest and 5.4 percentage points above the US figure (62.4%). Unemployment averaged 3.5% in 2025 and was 3.2%51 in September 2026. Commutes are short: the mean trip to work took 20.2 minutes, 7.2 minutes below the US figure (27.4 minutes)52.
The state has 151,216 veterans, 6.0% of civilian adults, not statistically different from the US figure (5.9%)53. Their service leans toward earlier eras: 35.4% served in the Vietnam era, 4.5 percentage points above the US figure (30.9%), and 22.9% after September 2001, 8.5 percentage points below the US figure (31.4%)54.
Iowa population questions
What is the population of Iowa?
The Census Bureau estimates that 3,238,387 people lived in Iowa on July 1, 2025, the 20th smallest1 of the 50 states and DC. The 2020 Census counted 3,190,3696 on April 1, 2020.
What will Iowa's population be in 2026?
There is no official 2026 figure yet. The Census Bureau publishes its July 1, 2026 state estimates (Vintage 2026) in December 2026; until then the latest official number is 3,238,3871 for July 1, 2025. This site does not publish projections.
What percent of Iowa is white?
In 2025, 80.2% of Iowans were white and not Hispanic, according to the American Community Survey, 25.2 percentage points above the US figure (55.0%)2. Counting everyone who reported white alone or with another race, of any ethnicity, the share is 89.8%55.
What percent of Iowa is Black?
Non-Hispanic Black residents made up 4.3% of the population in 2025 (±0.2 percentage points2). Including people who reported Black together with another race, the share is 6.0%13.
What is the population of Des Moines or Lee County?
This site covers states only, not cities or counties. The Census Bureau publishes city and county figures on data.census.gov.
More on Iowa
Neighboring states: Illinois, Minnesota, Missouri, Nebraska, South Dakota and Wisconsin. Put Iowa side by side with any other state on every measure in the comparison tool, or see where it places in the state rankings.
Iowa in every state ranking
| Ranking | Value | Rank |
|---|---|---|
| States by population | 3,238,387 | 20th smallest |
| Cost of living by state | 87.8 | tied for 3rd least expensive |
| Poverty rate by state | 11.0% | tied for 22nd lowest; could be 20th to 32nd lowest |
| Median household income by state | $76,483 | 15th lowest; could be 12th to 18th lowest |
| Most and least educated states | 32.6% | 12th lowest; could be 11th to 17th lowest |
| States by land area | 55,854 square miles | 23rd largest |
| GDP by state | $271.9 billion | 20th smallest |
| Life expectancy by state | 77.9 years | tied for 17th longest |
| Unemployment rate by state | 3.5% | tied for 15th lowest |
| Population growth by state | 0.25% | 14th lowest |
| Population density by state | 58.0 people per square mile | tied for 14th least densely populated |
| Black population by state | 4.9% | tied for 16th lowest |
| Hispanic and Latino population by state | 8.1% | 15th lowest |
| Median age by state | 39.4 years | tied for 17th youngest; could be 16th to 24th youngest |
| Median home value by state | $237,000 | 6th least expensive; could be 5th to 6th least expensive |
| Birth and fertility rates by state | 11.2 per 1,000 residents | tied for 17th highest |
| Domestic migration by state | −970 | 16th lowest |
| Foreign-born population by state | 6.6% | tied for 18th lowest; could be 16th to 20th lowest |
| GDP per capita by state | $83,973 | 24th highest |
| White population by state | 81.0% | 7th highest |
| Asian population by state | 2.7% | 18th lowest |
| American Indian and Alaska Native population by state | 2.2% | tied for 10th lowest; could be 5th to 21st lowest |
| Racial and ethnic diversity by state | 34.6 | 7th least diverse |
| Population 65 and older by state | 20.1% | 20th highest |
| Median gross rent by state | $1,026 | 2nd least expensive; could be 2nd to 3rd least expensive |
| Homeownership rate by state | 71.4% | 10th highest; could be 5th to 14th highest |
| Per capita personal income by state | $67,321 | 14th lowest |
| Income inequality by state | 0.453 | 12th least unequal; could be 3rd to 21st least unequal |
| Health insurance coverage by state | 5.7% | 12th lowest; could be 8th to 13th lowest |
| Adult obesity rate by state | 36.6% | tied for 15th highest |
| Teen birth rate by state | 12.2 per 1,000 females aged 15 to 19 | 26th highest |
| Infant mortality by state | 4.5 per 1,000 live births | tied for 8th lowest |
| Languages spoken at home by state | 10.2% | 18th lowest; could be 18th to 19th lowest |
| High school graduation rate by state | 90% | tied for 2nd highest |
| Veterans by state | 6.0% | tied for 15th lowest; could be 14th to 21st lowest |
| Children under 18 by state | 22.2% | tied for 14th highest |
| Rural population by state | 36.9% | 13th highest |
| SNAP and Medicaid enrollment by state | 8.2% | 12th lowest |
| Homelessness by state | 8.7 per 10,000 residents | 6th lowest |
| Religious adherence by state | 44.9% | 19th lowest |
| Sex ratio by state | 99.3 | 12th highest |
| Marriage and divorce rates by state | 5.3 per 1,000 residents | tied for 10th lowest |
| Millionaire tax returns by state | 2.9 per 1,000 tax returns | tied for 7th lowest |
| Catholic adherents by state | 14.7% | tied for 23rd lowest |
| Latter-day Saints by state | 0.9% | tied for 24th highest |
Source: Census Bureau, Population Estimates Program, Vintage 2025; BEA, SARPP Regional Price Parities by state; Census Bureau, American Community Survey 1-year estimates, 2025, table B17001; Census Bureau, American Community Survey 1-year estimates, 2025, table B19013; Census Bureau, American Community Survey 1-year estimates, 2025, table B15003; Census Bureau, 2024 Gazetteer Files; BEA, SAGDP1 State annual GDP summary; CDC National Center for Health Statistics, U.S. State Life Tables, 2022; Bureau of Labor Statistics, Local Area Unemployment Statistics; States Demographics, Computed; Census Bureau, Population Estimates Program, Vintage 2025; Census Bureau, American Community Survey 1-year estimates, 2025, table B01002; Census Bureau, American Community Survey 1-year estimates, 2025, table B25077; CDC National Center for Health Statistics, Births; Census Bureau, American Community Survey 1-year estimates, 2025, table B05002; Census Bureau, American Community Survey 1-year estimates, 2025, table B02010; States Demographics, Computed, table B03002; Census Bureau, American Community Survey 1-year estimates, 2025, table B25064; Census Bureau, American Community Survey 1-year estimates, 2025, table B25003; BEA, SAINC1 State annual personal income summary; Census Bureau, American Community Survey 1-year estimates, 2025, table B19083; Census Bureau, American Community Survey 1-year estimates, 2025, table B27010; CDC (BRFSS), BRFSS Prevalence Data; CDC National Center for Health Statistics, Stats of the States; Census Bureau, American Community Survey 1-year estimates, 2025, table C16001; Department of Education, NCES, Digest of Education Statistics 2023, Table 219.46; Census Bureau, American Community Survey 1-year estimates, 2025, table B21001; Census Bureau, 2020 Census urban and rural population by state; USDA Food and Nutrition Service (FNS), SNAP Monthly State Participation and Benefit Summary, Fiscal Year 2025; HUD Office of Policy Development and Research, 2025 AHAR; Association of Religion Data Archives (ARDA), U.S. Religion Census; CDC National Center for Health Statistics, Marriage rates by State; IRS Statistics of Income (SOI), SOI Tax Stats - Historic Table 2. For survey measures, the second rank is the range consistent with the 90% margins of error. Each ranking page gives every state, the period and the margins of error.
Sources
- Census Bureau, Population Estimates Program, Vintage 2025; released January 27, 2026. www2.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B03002; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B01002; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B19013; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B17001; 2025; released October 29, 2026. data.census.gov
- Census Bureau, 2020 Census apportionment results and historical resident population 1910-2020; Decennial censuses 1910-2020; released April 26, 2021. www2.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B01003; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 5-year estimates, 2020-2024, table B01003; 2020-2024; released January 29, 2026. data.census.gov
- Census Bureau, 2020 Census Apportionment Results, Table 1; 2020 Census (April 1, 2020); released April 26, 2021. www2.census.gov
- Census Bureau, Historical Census Statistics on Population Totals by Race, 1790 to 1990; table Tables 1 and 15-65; 1790-1990 censuses; released September 13, 2002. www2.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B05002; 2025; released October 29, 2026. data.census.gov
- Census Bureau, State-to-State Migration Flows, 2024; ACS 2024 1-year; released January 21, 2026. www2.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B02009; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2005-2019 and 2021-2025; 2005-2025 (no standard 2020 1-year release); released October 29, 2026. api.census.gov
- Census Bureau, Population Estimates Program, Vintage 2025; Vintage 2025 (July 1 2020-2025); released June 25, 2026. www2.census.gov
- Census Bureau, American Community Survey 5-year estimates, 2020-2024, table B03001; 2020-2024; released January 29, 2026. data.census.gov
- States Demographics, Computed, table B03002; 2025; released November 12, 2026.
- Census Bureau, 2020 Census urban and rural population by state; 2020 Census and 2010 Census; released December 29, 2022. www2.census.gov
- Census Bureau, 2024 Gazetteer Files; table 2024_Gaz_state_national; 2024; released September 1, 2024. www2.census.gov
- States Demographics, Computed; 2025; released November 12, 2026.
- Census Bureau, American Community Survey 1-year estimates, 2025, table B25024; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B08301; 2025; released October 29, 2026. data.census.gov
- CDC National Center for Health Statistics, Births; 2024 final natality; released June 9, 2026. www.cdc.gov
- BEA, SAINC1 State annual personal income summary; table SAINC1__ALL_AREAS_1929_2025.csv lines 1-3; 2025 (annual); released September 30, 2026. apps.bea.gov
- BEA, SARPP Regional Price Parities by state; 2024; released February 19, 2026. apps.bea.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B25064; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B25077; 2025; released October 29, 2026. data.census.gov
- Census Bureau, Poverty in the United States; CPS ASEC 2024-2026 (calendar years 2023, 2024, 2025); released September 15, 2026. www2.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B25003; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B25070; 2025; released October 29, 2026. data.census.gov
- Association of Religion Data Archives (ARDA), U.S. Religion Census; table RCMSST20; 2020; released March 31, 2023. www.thearda.com
- Association of Religion Data Archives (ARDA), U.S. Religion Census; table RCMSST10; 2010; released December 11, 2018. www.thearda.com
- Census Bureau, American Community Survey 1-year estimates, 2025, table B04006; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 5-year estimates, 2020-2024, table B04006; 2020-2024; released January 29, 2026. data.census.gov
- Census Bureau, American Community Survey 5-year estimates, 2020-2024, table B02015; 2020-2024; released January 29, 2026. data.census.gov
- Census Bureau, American Community Survey 5-year estimates, 2020-2024, table B02016; 2020-2024; released January 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table C16001; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B16001; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 5-year estimates, 2020-2024, table B16001; 2020-2024; released January 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B15003; 2025; released October 29, 2026. data.census.gov
- Department of Education, NCES, Digest of Education Statistics 2023, Table 219.46; school year 2021-22. nces.ed.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B11001; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B25010; 2025; released October 29, 2026. data.census.gov
- CDC National Center for Health Statistics, Marriage rates by State; 2024 provisional counts. www.cdc.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B12001; 2025; released October 29, 2026. data.census.gov
- HUD Office of Policy Development and Research, 2025 AHAR; Point-in-Time count, one night in the last 10 days of January 2025. www.huduser.gov
- CMS (Centers for Medicare & Medicaid Services), State Medicaid and CHIP Applications, Eligibility Determinations, and Enrollment Data; released October 30, 2026. data.medicaid.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B27010; 2025; released October 29, 2026. data.census.gov
- CDC National Center for Health Statistics, U.S. State Life Tables, 2022; 2022 final mortality; released December 4, 2025. www.cdc.gov
- CDC National Center for Health Statistics, Stats of the States. www.cdc.gov
- Bureau of Labor Statistics, Local Area Unemployment Statistics; 2025 annual averages; September 2026 monthly (preliminary). api.bls.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B08013; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B21001; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B21002; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B02008; 2025; released October 29, 2026. data.census.gov
- BEA, SAGDP1 State annual GDP summary; table SAGDP1__ALL_AREAS_1997_2025.csv lines 1,3; 2025; released September 30, 2026. apps.bea.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B02010; 2025; released October 29, 2026. data.census.gov
- Census Bureau, American Community Survey 1-year estimates, 2025, table B19083; 2025; released October 29, 2026. data.census.gov
- CDC (BRFSS), BRFSS Prevalence Data; 2024 survey year. data.cdc.gov
- USDA Food and Nutrition Service (FNS), SNAP Monthly State Participation and Benefit Summary, Fiscal Year 2025; FY2025 (Oct 2024-Sep 2025); released October 8, 2026. www.fns.usda.gov
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Citation: Grammich, C. A., Dollhopf, E., Gautier, M., Houseal, R., Jones, D. E., Krindatch, A., ... Thumma, S. (2023, March 31). U.S. Religion Census - Religious Congregations and Membership Study, 2020 (State File). DOI 10.17605/OSF.IO/6PGRZ. The data were downloaded from the Association of Religion Data Archives, www.theARDA.com, and were collected by Clifford A. Grammich, Erica Dollhopf, Mary Gautier, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley and Scott Thumma for the Association of Statisticians of American Religious Bodies (ASARB).
Citation: Grammich, C., Hadaway, K., Houseal, R., Jones, D. E., Krindatch, A., Stanley, R., & Taylor, R. H. (2018, December 11). U.S. Religion Census Religious Congregations and Membership Study, 2010 (State File). DOI 10.17605/OSF.IO/X8D69. The data were downloaded from the Association of Religion Data Archives, www.theARDA.com, and were collected by Clifford Grammich, Kirk Hadaway, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley and Richard H. Taylor for the ASARB.
Margins of error (±) are at the 90% confidence level. A difference is called significant only when it passes the Census Bureau's test at that level. How every figure is built: methodology. Found an error? Write to [email protected]; corrections are listed on the updates page.