Data downloads
All the data behind this site, for all 50 states, DC and the United States, in open formats. Free to reuse with credit.
Last updated November 12, 2026.
Files
| File | What it holds | Format | Size |
|---|---|---|---|
| states.csv | Every measure for every state, one row per state (wide CSV, value and margin of error columns). | CSV | 148 KB |
| states.json | The same data as JSON, one record per state and measure, with period and source. | JSON | 2.1 MB |
| metrics.csv | Data dictionary: every measure with its label, definition, unit, universe, period and source. | CSV | 84 KB |
| sources.json | Sources registry: agency, dataset, table, vintage, release and retrieval dates, URL and licence for every source. | JSON | 245 KB |
| population-history.csv | Population history: decennial census counts 1790–2020 and July 1 estimates 2000–2025. | CSV | 119 KB |
| religion-bodies.csv | Religious bodies by state, 2020: congregations, adherents and shares for every body that reported adherents (U.S. Religion Census 2020, via the ARDA; cite it as given under License). | CSV | 374 KB |
| acs-trends.csv | ACS 1-year trends 2005–2025 for key measures, with margins of error. | CSV | 1.2 MB |
What the files contain
The main table has one row per state and one column per measure, including the religion measures from the 2020 U.S. Religion Census, with a separate margin-of-error column for every survey measure. The data dictionary gives each measure's label, definition, period, universe and source. The sources registry gives every table's agency, release date, retrieval date and link. Population history and ACS trends are long tables with one row per state, measure and year.
Reading the files
- Identifiers. States use their two-letter postal codes and FIPS codes; the United States is "US". Measures use the identifiers listed in the data dictionary, such as `inc.median_hh` for median household income.
- Margins of error. Survey measures have a matching column ending in `_moe`, at the 90% confidence level. A blank margin of error means the source publishes none, as for population estimates and vital statistics.
- Periods. Each measure has its own reference period in the data dictionary: July 1, 2025 for population estimates, calendar 2025 for the American Community Survey, 2024 for regional price parities, and so on.
- Dollars. Income and housing values are in dollars of their survey year; the trend file's inflation-adjusted series are in 2025 dollars.
License
The underlying statistics are works of the U.S. Government and are in the public domain, except the religion measures (identifiers starting with `rel.` and the file of religious bodies), which come from the U.S. Religion Census distributed by the Association of Religion Data Archives. Reusing those requires the citation and acknowledgement printed at the foot of this page, as the ARDA's terms ask; they cover 2161 religious bodies that reported adherents in 2020. Our compilation, the selection, derived measures, rankings and file structure, is licensed under the Creative Commons Attribution 4.0 International license. You may reuse it for any purpose, including commercially, if you credit States Demographics.
How to cite
States Demographics, "State population and demographic data", data current to the October 29, 2026 release, https://statesdemographics.com/data/. Please also cite the original agency table for any figure you use; the source of each measure is in the data dictionary.
Updates
The files are rebuilt whenever a source is updated. The updates page lists release dates and changes.
Sources
- Association of Religion Data Archives (ARDA), U.S. Religion Census; table RCMSST20; 2020; released March 31, 2023. www.thearda.com
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).
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.