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Religious Traditions, 2010

157,336 22,969 281,174 1,254,340 19,632 95,411 1,743,235
Evangelical Protestant Black Protestant Mainline Protestant Catholic Orthodox Other Unclaimed

Congregational adherents include all full members, their children, and others who regularly attend services. The 2010 reports contain incomplete counts of congregations and adherents belonging to the eight largest historically African-American denominations. These denominations are not included in the 2000 reports and are largely missing from the 1990 and 1980 reports.
[More information on the data sources]


Religious Bodies Tradition Family Congregations Adherents % Change
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints +8 +6915 +85.6%
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal +33 +5810 +162.8%
Seventh-day Adventist Church Evangelical Protestant Adventist +27 +3912 +80.9%
Assemblies of God Evangelical Protestant Pentecostal +13 +3887 +27.6%
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist +4 +2598 +107.7%
Salvation Army Evangelical Protestant Holiness +4 +2379 +162.8%
Christian and Missionary Alliance, The Evangelical Protestant Holiness +7 +1238 +90.8%
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist +7 +1147 +45.5%
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed +9 +915 +481.6%
Church of God of Prophecy Evangelical Protestant Pentecostal -2 +807 +236%
Free Methodist Church of North America Evangelical Protestant Holiness +5 +775 +389.4%
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran 0 +435 +265.2%
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed +4 +293 +104.6%
Pentecostal Church of God Evangelical Protestant Pentecostal +2 +242 +284.7%
Churches of Christ Evangelical Protestant Baptist -8 +180 +7.4%
Christian Churches and Churches of Christ Evangelical Protestant Baptist -2 +169 +31.9%
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal +1 +140 +92.1%
International Pentecostal Holiness Church Evangelical Protestant Pentecostal 0 +113 +289.7%
Wesleyan Church, The Evangelical Protestant Holiness +3 +14 +8.5%
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 0 -1 -0.4%
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 0 -18 -6.8%
Apostolic Christian Church of America, Inc. Evangelical Protestant European Free-Church 0 -20 -3.4%
Seventh Day Baptist General Conference, USA and Canada Evangelical Protestant Baptist +1 -31 -34.8%
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 0 -210 -67.7%
Unitarian Universalist Association of Congregations Other Liberal -1 -239 -5.7%
American Carpatho-Russian Orthodox Diocese Orthodox Eastern Liturgical (Orthodox) 0 -330 -24.8%
Church of the Nazarene Evangelical Protestant Holiness +1 -446 -18.2%
Christian Church (Disciples of Christ) Mainline Protestant Baptist +3 -515 -75.4%
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed -1 -1079 -24%
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) 0 -1100 -68.8%
Southern Baptist Convention Evangelical Protestant Baptist +24 -1654 -18.5%
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed -1 -2811 -27.6%
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed -8 -3583 -84.5%
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran +1 -5421 -35.7%
American Baptist Churches in the USA Mainline Protestant Baptist -5 -7536 -15.6%
United Methodist Church, The Mainline Protestant Methodist/Pietist -10 -8745 -15.5%
Evangelical Lutheran Church in America Mainline Protestant Lutheran -3 -10801 -30.4%
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist -7 -16310 -73.6%
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism -15 -19543 -24.8%
United Church of Christ Mainline Protestant Presbyterian-Reformed -18 -38725 -28.6%
Catholic Church Catholic Catholicism -17 -121811 -8.9%
Christian Brethren Evangelical Protestant Ind. Fundamentalist -10 --- ---
Church of Christ, Scientist Other Christian Science -8 --- ---
Conservative Baptist Association of America Evangelical Protestant Baptist 0 --- ---
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) +1 --- ---
International Pentecostal Church of Christ Evangelical Protestant Pentecostal --- --- ---
North American Baptist Conference Evangelical Protestant Baptist 0 --- ---
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 0 --- ---
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) +6 --- ---
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) +4 --- ---
Totals: +52 -208960 -11.3%

The population of Connecticut was 3,287,116 in 1990; in 1980 it was 3,107,576. The total population changed 5.8%. The adherent totals of the religious groups listed above (2,047,646) included 62.3% of the total population in 1990.

The population of Connecticut was 3,574,097 in 2010; in 2000 it was 3,405,565. The total population changed 4.9%. The adherent totals of the religious groups listed above (1,830,862) included 51.2% of the total population in 2010.

* In an effort to better match the ASARB standards for adherents, a few religious bodies changed the way their adherents were reported in 2010, including the Catholic Church, Amish groups, Friends groups, Jewish groups, the Church of Jesus Christ of Latter-day Saints, Non-denominational Christian Churches, and the United Methodist Church. This change does not affect any of the data in the newly released 2010 U.S. Religion Census: Religious Congregations & Membership Study. In fact, the data for these groups are now more comparable to that of other bodies than it was in previous decadal reports.

However, the change in methodology can distort assessments on growth or decline between 2000 and 2010 for each of these groups. County-level 2000 data using the new methodology are not readily available. ASARB staff has adjusted some 2000 county-level adherent statistics to allow for a more accurate picture on growth or decline. The revised maps and charts are now available on-line at for those who are interested in these trends.


2010 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include statistics for 236 religious groups, providing information on the number of their congregations and adherents within each state and county in the United States. Clifford Grammich, Kirk Hadaway, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley and Richard H. Taylor supervised the collection. These data originally appeared in 2010 U.S. Religion Census: Religious Congregations & Membership Study, published by the Association of Statisticians of American Religious Bodies (ASARB). [More information on the data collection]

The adherence rate provides the number of adherents of a particular group per 1,000 population. For example, in 2010 the Episcopal Church had an adherence rate of 7.6 in Autauga County, Alabama. This means that about 8 out of every 1,000 people in Autauga County were Episcopalian.

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