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The ARDA Data Archive is a collection of surveys, polls, and other data submitted by researchers and made available online by the ARDA.

There are 1,282 data files included in the ARDA collection. You can browse files by category, alphabetically, view the newest additions, or search for a file. Once you select a file you can preview the results, read about how the data were collected, review the survey questions asked, save selected survey questions to your own file, and/or download the data file.

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U.S. Church Membership Data -

      County-Level Data

Churches and Church Membership in the United States, 1952 (Counties)
This study was an effort to gather the statistics of churches and church membership throughout the United States for 1952. The data presented here are county-level data based on the cooperation of 114 religious denominations in the continental United States. [See More...]

Churches and Church Membership in the United States, 1971 (Counties)
This data set contains statistics by county on Christian churches and membership for 1971. Fifty-three denominations are included, representing an estimated 81 percent of church membership in the United States. [See More...]

Churches and Church Membership in the United States, 1980 (Counties)
This data set contains statistics by county for 111 Judeo-Christian church bodies, providing information on their number of churches and members. The denominations included represent an estimated 91 percent of U.S. membership totals officially submitted to the Yearbook of American and Canadian Churches. Please note that this data set may not be sold in any form, including as an addition to proprietary software, without the permission of the copyright holder. Churches and Church Membership in the United States, 1980 is published by the Glenmary Research Center, P.O. Box 507, Mars Hill, NC 28754. [See More...]

Churches and Church Membership in the United States, 1990 (Counties)
This data set contains statistics by county for 133 Judeo-Christian church bodies, providing information on their number of churches and members. [See More...]

Longitudinal Religious Congregations and Membership File, 1980-2010 (County Level)
This dataset is a longitudinal version of the Churches and Church Membership in the United States studies from 1980 and 1990, and the Religious Congregations and Membership Studies from 2000 and 2010. It contains the adherent and congregation counts of 302 religious groups that participated in at least one of the 1980-2010 data collections. It is very important to understand how this file differs from its standalone counterparts, and its many limitations. Using these data for over-time comparisons without reading any documentation will likely result in inaccurate statistics. Data users are strongly urged to read the paper by Rachel Bacon, Roger Finke and Dale Jones that details all the changes made when creating the longitudinal file. Major changes made to the file include new variable naming schemes, new combined religious groups that correct for schisms and mergers, new adherent counts for the United Methodist Church, count estimates for missing data among 40 groups and aggregated county units. Users can download the paper here. Users can download the appendices here: Appendix A, Appendix B, Appendix C. [See More...]

Statistics of Churches in the United States, County File, 1890
The Statistics of Churches in the United States was part of the 11th Census, conducted in 1890 (the U.S. Census collected data on religion through the 1936 census, though the 1890 Census was the first to count the number of members). The Census collected data on church seating capacity, property value, number of members, number of edifices ("buildings owned and used for worship"), and number of organizations (churches, mission stations when separate from congregation, chapels when they are separate from churches, and societies or meetings among groups that designate such organizations). The data are organized by counties (counties are the cases). Measures for religions in Indian Territories are also included. [See More...]

U.S. Religion Census - Religious Congregations and Membership Study, 2000 (County File)
This study, designed and completed by the Association of Statisticians of American Religious Bodies (ASARB), represents statistics for 149 religious bodies on the number of congregations within each county of the United States. Where available, also included are actual membership (as defined by the religious body) and total adherents figures. Participants included 149 Christian denominations, associations, or communions (including Latter-day Saints and Unitarian/Universalist groups); two specially defined groups of independent Christian churches; Jewish and Islamic totals; and counts of temples for six Eastern religions. [See More...]

U.S. Religion Census - Religious Congregations and Membership Study, 2010 (County File)
This study, designed and carried out by the Association of Statisticians of American Religious Bodies (ASARB), compiled data on the number of congregations and adherents for 236 religious groups in each county of the United States. Participants included 217 Christian denominations, associations, or communions (including Latter-day Saints, Messianic Jews, and Unitarian/Universalist groups); counts of Jain, Shinto, Sikh, Tao and National Spiritualist Association congregations, and counts of congregations and adherents from Baha'ís, three Buddhist groupings, four Hindu groupings, four Jewish groupings, Muslims and Zoroastrians. The 236 groups reported a total of 344,894 congregations with 150,686,156 adherents, comprising 48.8 percent of the total U.S. population of 308,745,538 in 2010. [See More...]

U.S. Religion Census - Religious Congregations and Membership Study, 2010 (Metro Area File)
This study, designed and carried out by the Association of Statisticians of American Religious Bodies (ASARB), compiled data on the number of congregations and adherents for 236 religious groups in each county of the United States. Participants included 217 Christian denominations, associations, or communions (including Latter-day Saints, Messianic Jews, and Unitarian/Universalist groups); counts of Jain, Shinto, Sikh, Tao and National Spiritualist Association congregations, and counts of congregations and adherents from Bahá'ís, three Buddhist groupings, four Hindu groupings, four Jewish groupings, Muslims and Zoroastrians. The 236 groups reported a total of 344,894 congregations with 150,686,156 adherents, comprising 48.8 percent of the total U.S. population of 308,745,538 in 2010. [See More...]

U.S. Religion Census - Religious Congregations and Membership Study, 2020 (County File)
This study, designed and carried out by the Association of Statisticians of American Religious Bodies (ASARB), compiled data on 372 religious bodies by county in the United States. Of these, the ASARB was able to gather data on congregations and adherents for 217 religious bodies and on congregations only for 155. Participating bodies included 354 Christian denominations, associations, or communions (including Latter-day Saints, Messianic Jews, and Unitarian/Universalist groups); counts of Jain, Shinto, Sikh, Tao, Zoroastrian, American Ethical Union, and National Spiritualist Association congregations, and counts of congregations and adherents from Baha'i, three Buddhist groupings, two Hindu groupings, four Jewish groupings, and Muslims. The 372 groups reported a total of 356,642 congregations with 161,224,088 adherents, comprising 48.6 percent of the total U.S. population of 331,449,281. Membership totals were estimated for some religious groups. [See More...]

U.S. Religion Census - Religious Congregations and Membership Study, 2020 (Metro Area File)
This study, designed and carried out by the Association of Statisticians of American Religious Bodies (ASARB), compiled data on 372 religious bodies by county in the United States. Of these, the ASARB was able to gather data on congregations and adherents for 217 religious bodies and on congregations only for 155. Participating bodies included 354 Christian denominations, associations, or communions (including Latter-day Saints, Messianic Jews, and Unitarian/Universalist groups); counts of Jain, Shinto, Sikh, Tao, Zoroastrian, American Ethical Union, and National Spiritualist Association congregations, and counts of congregations and adherents from Baha'i, three Buddhist groupings, two Hindu groupings, and four Jewish groupings, and Muslims. The 372 groups reported a total of 356,642 congregations with 161,224,088 adherents, comprising 48.6 percent of the total U.S. population of 331,449,281. Membership totals were estimated for some religious groups. [See More...]

United States Census of Religious Bodies, County File, 1906
The United States Census of Religious Bodies is, as the name suggests, a census of religious organizations, not a census of individuals (the U.S. Census collected data on religious organizations through the 1936 census). This census provides measures of the number of members in various denominations, by geographic unit. This is the first of four complete surveys on the subject of religious membership undertaken by the U.S. Bureau of the Census (followed by the 1916, 1926, and 1936 censuses). The data are organized by counties (counties are the cases). [See More...]

United States Census of Religious Bodies, County File, 1916
The United States Census of Religious Bodies is, as the name suggests, a census of religious organizations, not a census of individuals (the U.S. Census collected data on religious organizations through the 1936 census). This census provides measures of the number of members in various denominations, by geographic unit. This is the second of four complete surveys on the subject of religious membership undertaken by the U.S. Bureau of the Census (preceded by the 1906 census and followed by the 1926 and 1936 censuses). The data are organized by county (counties are the cases). [See More...]

United States Census of Religious Bodies, County File, 1926
The United States Census of Religious Bodies is, as the name suggests, a census of religious organizations, not a census of individuals (the U.S. Census collected data on religious organizations through the 1936 census). This census provides measures of the number of members in various denominations, by geographic unit. This is the third of four complete surveys on the subject of religious membership undertaken by the U.S. Bureau of the Census (preceded by the 1906 and 1916 censuses and followed by the 1936 censuses). The data are organized by county (counties are the cases). [See More...]

United States Census of Religious Bodies, County File, 1936
The United States Census of Religious Bodies is, as the name suggests, a census of religious organizations, not a census of individuals (the U.S. Census collected data on religious organizations through the 1936 census). This census provides measures of the number of members in various denominations, by geographic unit. This is the fourth of four complete surveys on the subject of religious membership undertaken by the U.S. Bureau of the Census (preceded by the 1906, 1916, and 1926, censuses). The data are organized by county (counties are the cases). [See More...]

      State-Level Data

Churches and Church Membership in the United States, 1952 (States)
This study was an effort to gather the statistics of churches and church membership throughout the United States for 1952. The data presented here are state-level data based on the cooperation of 114 religious denominations in the continental United States. [See More...]

Churches and Church Membership in the United States, 1971 (States)
This data set contains statistics by state on Christian churches and membership for 1971. Fifty-three denominations are included, representing an estimated 81 percent of church membership in the United States. [See More...]

Churches and Church Membership in the United States, 1980 (States)
This data set contains statistics by state for 111 Judeo-Christian church bodies, providing information on their number of churches and members. The denominations included represent an estimated 91 percent of U.S. membership totals officially submitted to the Yearbook of American and Canadian Churches. Please note that this data set may not be sold in any form, including as an addition to proprietary software, without the permission of the copyright holder. Churches and Church Membership in the United States, 1980 is published by the Glenmary Research Center, P.O. Box 507, Mars Hill, NC 28754. [See More...]

Churches and Church Membership in the United States, 1990 (States)
This data set contains statistics by state for 133 Judeo-Christian church bodies, providing information on the number of churches and members. It is not known exactly what percent of total Judeo-Christian adherents this actually represents. When compared to the Yearbook of American and Canadian Churches: 1990, this study accounts for 23 percent more communicant members. [See More...]

History of American Religion, 1770-1930
The History of American Religion, 1770-1930 dataset allows users to examine historical change in religious and social measures in the United States from 1770 to 1930 using state-level historical data. Through the aid of U.S. Censuses, ICPSR, the American Presidency Project, and prominent religion scholars like Roger Finke and Rodney Stark, the file includes more than 290 historical variables that measure the religious adherence rates, population estimates, voting behavior, employment, and other social indicators over time. [See More...]

Longitudinal Religious Congregations and Membership File, 1980-2010 (State Level)
This dataset is a longitudinal version of the Churches and Church Membership in the United States studies from 1980 and 1990, and the Religious Congregations and Membership Studies from 2000 and 2010. It contains the adherent and congregation counts of 302 religious groups that participated in at least one of the 1980-2010 data collections. It is very important to understand how this file differs from its standalone counterparts, and its many limitations. Using these data for over-time comparisons without reading any documentation will likely result in inaccurate statistics. Data users are strongly urged to read the paper by Rachel Bacon, Roger Finke and Dale Jones that details all the changes made when creating the longitudinal file. Major changes made to the file include new variable naming schemes, new combined religious groups that correct for schisms and mergers, new adherent counts for the United Methodist Church, and count estimates for missing data among 40 groups. Users can download the paper here. Users can download the appendices here: Appendix A, Appendix B, Appendix C. [See More...]

Statistics of Churches in the United States, State File, 1890
The Statistics of Churches in the United States was part of the 11th Census, conducted in 1890 (the U.S. Census collected data on religion through the 1936 Census, though the 1890 Census was the first to count the number of members). The Census collected data on church seating capacity, property value, number of members, number of edifices ("buildings owned and used for worship"), and number of organizations (churches, mission stations when separate from congregation, chapels when they are separate from churches, and societies or meetings among groups that designate such organizations). The data are organized by states (states are the cases). Measures for religions in Indian Territories are also included. [See More...]

U.S. Religion Census - Religious Congregations and Membership Study, 2000 (State File)
This study, designed and completed by the Association of Statisticians of American Religious Bodies (ASARB), represents statistics for 149 religious bodies on the number of congregations within each county of the United States. Where available, also included are actual membership (as defined by the religious body) and total adherents figures. Participants included 149 Christian denominations, associations, or communions (including Latter-day Saints and Unitarian/Universalist groups); two specially defined groups of independent Christian churches; Jewish and Islamic totals; and counts of temples for six Eastern religions. [See More...]

U.S. Religion Census - Religious Congregations and Membership Study, 2010 (State File)
This study, designed and carried out by the Association of Statisticians of American Religious Bodies (ASARB), compiled data on the number of congregations and adherents for 236 religious groups in each county of the United States. Participants included 217 Christian denominations, associations, or communions (including Latter-day Saints, Messianic Jews, and Unitarian/Universalist groups); counts of Jain, Shinto, Sikh, Tao and National Spiritualist Association congregations, and counts of congregations and adherents from Bahá'ís, three Buddhist groupings, four Hindu groupings, four Jewish groupings, Muslims and Zoroastrians. The 236 groups reported a total of 344,894 congregations with 150,686,156 adherents, comprising 48.8 percent of the total U.S. population of 308,745,538 in 2010. [See More...]

U.S. Religion Census - Religious Congregations and Membership Study, 2020 (State File)
This study, designed and carried out by the Association of Statisticians of American Religious Bodies (ASARB), compiled data on 372 religious bodies by county in the United States. Of these, the ASARB was able to gather data on congregations and adherents for 217 religious bodies and on congregations only for 155. Participating bodies included 354 Christian denominations, associations, or communions (including Latter-day Saints, Messianic Jews, and Unitarian/Universalist groups); counts of Jain, Shinto, Sikh, Tao, Zoroastrian, American Ethical Union, and National Spiritualist Association congregations, and counts of congregations and adherents from Baha'i, three Buddhist groupings, two Hindu groupings, and four Jewish groupings, and Muslims. The 372 groups reported a total of 356,642 congregations with 161,224,088 adherents, comprising 48.6 percent of the total U.S. population of 331,449,281. Membership totals were estimated for some religious groups. [See More...]

United States Census of Religious Bodies, Expanded State File, 1906
The United States Census of Religious Bodies is, as the name suggests, a census of religious organizations, not a census of individuals (the U.S. Census collected data on religious organizations through the 1936 census). This census provides measures of the number of organizations, number of edifices, seating capacity, property value, and number of members in various denominations, by geographic unit. This is the first of four complete surveys on the subject of religious bodies undertaken by the U.S. Bureau of the Census (followed by the 1916, 1926, and 1936 censuses). The data are organized by states (states are the cases). [See More...]

United States Census of Religious Bodies, State File, 1916
The United States Census of Religious Bodies is, as the name suggests, a census of religious organizations, not a census of individuals (the U.S. Census collected data on religious organizations through the 1936 census). This census provides measures of the number of members in various denominations, by geographic unit. This is the second of four complete surveys on the subject of religious membership undertaken by the U.S. Bureau of the Census (preceded by the 1906 census and followed by the 1926 and 1936 censuses). The data are organized by states (states are the cases). [See More...]

United States Census of Religious Bodies, State File, 1926
The United States Census of Religious Bodies is, as the name suggests, a census of religious organizations, not a census of individuals (the U.S. Census collected data on religious organizations through the 1936 census). This census provides measures of the number of members in various denominations, by geographic unit. This is the third of four complete surveys on the subject of religious membership undertaken by the U.S. Bureau of the Census (preceded by the 1906 and 1916 censuses and followed by the 1936 censuses). The data are organized by state (states are the cases). [See More...]

United States Census of Religious Bodies, State File, 1936
The United States Census of Religious Bodies is, as the name suggests, a census of religious organizations, not a census of individuals (the U.S. Census collected data on religious organizations through the 1936 census). This census provides measures of the number of members in various denominations, by geographic unit. This is the fourth of four complete surveys on the subject of religious membership undertaken by the U.S. Bureau of the Census (preceded by the 1906, 1916, and 1926, censuses). The data are organized by state (states are the cases). [See More...]

U.S. Surveys +

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              National Studies of Youth and Religion (NSYR) +

              National Survey of Family Growth +

              News Polls +

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              Portraits of American Life Study (PALS) +

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              State of the First Amendment Surveys +

              Other National Surveys +

     Local/Regional Surveys +

              Middletown Data +

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