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Religious Traditions, 2010

157,336 22,969 281,174 19,632 1,254,340 95,411 1,743,235
Evangelical Protestant Black Protestant Mainline Protestant Orthodox Catholic 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 Adherence Rate
Catholic Church Catholic Catholicism 438 1,390,607 447.5
United Church of Christ Mainline Protestant Presbyterian-Reformed 262 130,993 42.2
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 186 107,324 34.5
United Methodist Church, The Mainline Protestant Methodist/Pietist 136 61,196 19.7
American Baptist Churches in the USA Mainline Protestant Baptist 125 44,101 14.2
Evangelical Lutheran Church in America Mainline Protestant Lutheran 76 40,896 13.2
Jewish Other Judaism 58 23,248 7.5
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 29 21,468 6.9
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 35 16,204 5.2
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 16 10,850 3.5
Assemblies of God Evangelical Protestant Pentecostal 51 9,859 3.2
Salvation Army Evangelical Protestant Holiness 19 6,138 2.0
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 24 5,810 1.9
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 13 4,798 1.5
Southern Baptist Convention Evangelical Protestant Baptist 18 4,615 1.5
Unitarian Universalist Association of Congregations Other Liberal 19 4,279 1.4
Christian Methodist Episcopal Church Black Protestant Methodist/Pietist 7 3,678 1.2
Seventh-day Adventist Church Evangelical Protestant Adventist 25 3,591 1.2
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 15 3,101 1.0
Conservative Baptist Association of America Evangelical Protestant Baptist 15 2,061 0.7
Churches of Christ Evangelical Protestant Restoration Movement 21 2,022 0.7
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 12 1,962 0.6
Christian Brethren Evangelical Protestant Ind. Fundamentalist 17 1,960 0.6
Church of the Nazarene Evangelical Protestant Holiness 10 1,828 0.6
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 18 1,305 0.4
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 12 1,236 0.4
Advent Christian Church Evangelical Protestant Adventist 10 1,112 0.4
Christian and Missionary Alliance, The Evangelical Protestant Holiness 9 1,035 0.3
Friends (Quakers) Mainline Protestant European Free-Church 9 916 0.3
Christian Church (Disciples of Christ) Mainline Protestant Restoration Movement 5 758 0.2
Estonian Evangelical Lutheran Church Mainline Protestant Lutheran 1 578 0.2
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) 3 575 0.2
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran 4 561 0.2
Christian Churches and Churches of Christ Evangelical Protestant Restoration Movement 6 379 0.1
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) 1 350 0.1
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 3 255 0.1
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 2 240 0.1
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran 1 216 0.1
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 2 189 0.1
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 2 150 0.0
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 1 147 0.0
North American Baptist Conference Evangelical Protestant Baptist 2 141 0.0
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed 1 108 0.0
Mennonite Church Evangelical Protestant European Free-Church 1 93 0.0
Seventh Day Baptist General Conference, USA and Canada Evangelical Protestant Baptist 2 89 0.0
Orthodox Presbyterian Church, The Evangelical Protestant Presbyterian-Reformed 1 82 0.0
General Church of the New Jerusalem Other Spiritualist 1 24 0.0
Apostolic Christian Churches (Nazarene) Evangelical Protestant European Free-Church 1 20 0.0
Christ Catholic Church Evangelical Protestant Catholicism --- --- ---
Free Methodist Church of North America Evangelical Protestant Holiness --- --- ---
Totals: 1,725 1,913,148  

The population of Connecticut was 3,107,576 in 1980. The adherent totals of the religious groups listed above (1,913,148) included 61.6% of the total population in 1980.

* 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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