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Connecticut - State Membership Report (2010)

Exact definitions of "congregations" and "adherents" vary by religious body. Congregations may be parishes, churches, synagogues, mosques, temples, or another site where a religious body has regularly scheduled worship services. Adherents generally are members, children who are not members, and others who are not members but are considered participants in the congregation.

[More information on the data sources]

Religious Bodies Tradition Family Congregations Adherents Adherence Rate
Catholic Church Catholic Catholic Liturgical Family 399 1,252,936 350.56
United Church of Christ Mainline Protestant Congregationalists (United Church of Christ) Family 242 96,506 27.00
Non-denominational Christian Churches Evangelical Protestant Other Groups Family 276 72,863 20.39
Episcopal Church Mainline Protestant Anglican/Episcopal Family 171 59,261 16.58
United Methodist Church Mainline Protestant Methodist Family 124 47,627 13.33
American Baptist Churches in the U.S.A. Mainline Protestant Baptist Family 122 40,672 11.38
Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 73 24,736 6.92
Reform Judaism Judaism Judaism Family 22 20,366 5.70
Conservative Judaism Judaism Judaism Family 27 18,681 5.23
Assemblies of God, General Council of the Evangelical Protestant Pentecostal Family 89 17,947 5.02
Church of Jesus Christ of Latter-day Saints Latter-day Saints Latter-day Saints (Mormonism) Family 32 14,990 4.19
Muslim Estimate Islam Islam Family 36 13,418 3.75
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) Family 17 11,727 3.28
Lutheran Church-Missouri Synod (LCMS) Evangelical Protestant Lutheran Family 37 9,785 2.74
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal Family 63 9,379 2.62
Seventh-day Adventist Church Evangelical Protestant Adventist Family 55 8,749 2.45
Orthodox Judaism Judaism Judaism Family 35 8,160 2.28
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian/Reformed Family 19 7,380 2.06
Southern Baptist Convention Evangelical Protestant Baptist Family 52 7,271 2.03
African Methodist Episcopal Zion Church Black Protestant Methodist Family 24 5,845 1.64
Buddhism, Mahayana Buddhism Buddhism Family 23 5,297 1.48
Converge Worldwide Evangelical Protestant Baptist Family 17 5,010 1.40
African Methodist Episcopal Church Black Protestant Methodist Family 14 4,474 1.25
Unitarian Universalist Association Other Christians Liberal Family 19 3,928 1.10
Hinduism: Indian-American Hindu Temple Associations Hinduism Hinduism Family 6 3,890 1.09
Church of God in Christ Black Protestant Pentecostal Family 27 3,870 1.08
Salvation Army Evangelical Protestant Holiness Family 22 3,840 1.07
Evangelical Free Church of America Evangelical Protestant Methodist Family 23 3,666 1.03
National Association of Congregational Christian Churches Mainline Protestant Congregationalists (United Church of Christ) Family 25 3,412 0.95
Orthodox Church in America, The Orthodox Eastern Liturgical (Orthodox) Family 18 3,086 0.86
National Baptist Convention, USA, Inc. Black Protestant Baptist Family 5 2,858 0.80
National Baptist Convention of America International, Inc. Black Protestant Baptist Family 3 2,774 0.78
Evangelical Covenant Church Evangelical Protestant Methodist Family 14 2,644 0.74
Churches of Christ Evangelical Protestant Restorationists Family 23 2,618 0.73
Christian and Missionary Alliance Evangelical Protestant Holiness Family 19 2,601 0.73
Christian Methodist Episcopal Church Black Protestant Methodist Family 7 2,180 0.61
Church of the Nazarene Evangelical Protestant Holiness Family 20 2,007 0.56
Hinduism: Traditional Hindu Temples Hinduism Hinduism Family 2 1,883 0.53
United Catholic Church Catholic Other Groups Family 2 1,404 0.39
Buddhism, Theravada Buddhism Buddhism Family 4 1,296 0.36
Church of God of Prophecy Evangelical Protestant Pentecostal Family 8 1,149 0.32
Presbyterian Church in America Evangelical Protestant Presbyterian/Reformed Family 12 1,105 0.31
Antiochian Orthodox Christian Archdiocese of North America Orthodox Eastern Liturgical (Orthodox) Family 2 1,061 0.30
Baha'i Faith Other Other Groups Family 8 1,014 0.28
American Carpatho-Russian Orthodox Diocese of the USA Orthodox Eastern Liturgical (Orthodox) Family 4 1,003 0.28
Armenian Apostolic Church (Catholicosate of Etchmiadzin) Orthodox Eastern Liturgical (Orthodox) Family 3 1,000 0.28
Free Methodist Church – USA Evangelical Protestant Holiness Family 6 974 0.27
Buddhism, Vajrayana Buddhism Buddhism Family 10 917 0.26
National Missionary Baptist Convention of America Black Protestant Baptist Family 4 727 0.20
Christian Churches and Churches of Christ Evangelical Protestant Restorationists Family 6 699 0.20
Hinduism: Hindu Post Renaissance Hinduism Hinduism Family 21 686 0.19
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian/Reformed Family 4 657 0.18
Friends General Conference and Friends United Meeting, dually aligned meetings Mainline Protestant Friends/Brethren Family 10 628 0.18
International Churches of Christ Evangelical Protestant Baptist Family 3 621 0.17
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran Family 2 599 0.17
Apostolic Christian Church of America Evangelical Protestant Froehlich Churches Family 1 575 0.16
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian/Reformed Family 8 573 0.16
Ukrainian Orthodox Church of the U.S.A. Orthodox Eastern Liturgical (Orthodox) Family 5 525 0.15
Armenian Apostolic Church (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) Family 1 500 0.14
Association of Vineyard Churches Evangelical Protestant Pentecostal Family 3 471 0.13
Reconstructionist Judaism Judaism Judaism Family 1 432 0.12
Coptic Orthodox Church Orthodox Eastern Liturgical (Orthodox) Family 1 390 0.11
Community of Christ Evangelical Protestant Latter-day Saints (Mormonism) Family 3 365 0.10
Russian Orthodox Church Outside of Russia, The Orthodox Eastern Liturgical (Orthodox) Family 4 340 0.10
Pentecostal Church of God Evangelical Protestant Pentecostal Family 3 327 0.09
International Church of the Foursquare Gospel Evangelical Protestant Pentecostal Family 6 292 0.08
Christian Reformed Church in North America Evangelical Protestant Presbyterian/Reformed Family 1 245 0.07
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran Family 2 243 0.07
Progressive National Baptist Convention, Inc. Black Protestant Baptist Family 1 241 0.07
Evangelical Presbyterian Church (1981) Evangelical Protestant Presbyterian/Reformed Family 1 184 0.05
Wesleyan Church Evangelical Protestant Holiness Family 4 179 0.05
Christian Church (Disciples of Christ) Mainline Protestant Restorationists Family 8 168 0.05
International Pentecostal Holiness Church Evangelical Protestant Pentecostal Family 1 152 0.04
Orthodox Presbyterian Church Evangelical Protestant Presbyterian/Reformed Family 2 132 0.04
Lutheran Congregations in Mission for Christ Evangelical Protestant Lutheran Family 2 131 0.04
Universal Fellowship of Metropolitan Community Churches Mainline Protestant Other Groups Family 2 127 0.04
Church of God (Anderson, Indiana) Evangelical Protestant Holiness Family 2 100 0.03
Federation of Zoroastrian Associations of North America Other Other Groups Family 0 88 0.02
International Pentecostal Church of Christ Evangelical Protestant Pentecostal Family 1 75 0.02
Seventh Day Baptist General Conference of the United States and Canada Evangelical Protestant Baptist Family 3 58 0.02
Bible Fellowship Church Evangelical Protestant Holiness Family 1 43 0.01
Open Bible Churches Evangelical Protestant Pentecostal Family 1 29 0.01
Church of God in Christ, Mennonite Evangelical Protestant Mennonite/Amish Family 1 0 0.00
Alliance of Baptists Mainline Protestant Baptist Family 1
Anglican Church in North America Evangelical Protestant Anglican/Episcopal Family 7
Association of Reformed Baptist Churches of America Evangelical Protestant Baptist Family 1
Korean Presbyterian Church in America Evangelical Protestant Presbyterian/Reformed Family 4
Calvary Chapel Evangelical Protestant Pentecostal Family 2
Church of Christ, Scientist Other Christians Christian Science Family 18
Unity Churches, Association of Other Christians Other Groups Family 7
General Conference of the Church of God (Seventh Day) Evangelical Protestant Adventist Family 2
Church of our Lord Jesus Christ of the Apostolic Faith, Inc. Black Protestant Pentecostal Family 12
Conservative Baptist Association of America (CBAmerica) Evangelical Protestant Baptist Family 14
Elim Fellowship Evangelical Protestant Pentecostal Family 4
Full Gospel Baptist Church Fellowship International Black Protestant Baptist Family 3
Fellowship of Grace Brethren Churches Mainline Protestant Friends/Brethren Family 2
International Fellowship of Christian Assemblies Evangelical Protestant Pentecostal Family 3
International Council of Community Churches Mainline Protestant Presbyterian/Reformed Family 3
Jain Other Other Groups Family 2
Jehovah's Witnesses Jehovah's Witnesses Adventist Family 55
National Spiritualist Association of Churches Other Spiritualist Family 6
New Apostolic Church USA Other Christians Other Groups Family 4
North American Baptist Conference Evangelical Protestant Baptist Family 1
Pentecostal Fire-Baptized Holiness Church Evangelical Protestant Pentecostal Family 5
Polish National Catholic Church of America Catholic Catholic Liturgical Family 11
Christian Brethren (Plymouth Brethren) Evangelical Protestant Independent Fundamentalist Family 5
Reformed Baptist Church Evangelical Protestant Baptist Family 2
General Association of Regular Baptist Churches Evangelical Protestant Baptist Family 3
Unaffiliated Friends Meetings Mainline Protestant Friends/Brethren Family 1
American Sikh Council Other Other Groups Family 2
Tao Other Other Groups Family 2
Union of Messianic Jewish Congregations Other Christians Other Groups Family 2
United Holy Church of America Black Protestant Pentecostal Family 6
United Pentecostal Church International Evangelical Protestant Pentecostal Family 27
United Pentecostal Council of the Assemblies of God Evangelical Protestant Pentecostal Family 1
           

Religious Traditions (1980 - 2020), Percent of Population


The population of this state was 3,574,097 in 2010. The adherent totals of the religious groups listed above (1,830,862) included 51.2% of the total population in 2010. The adherence rate is the number of adherents of a given group per 1,000 people in the general population.

Note that data collection methods for religious bodies change over time, affecting the comparability of statistics. For further information, see the U.S. Religion Census website at https://www.usreligioncensus.org/.

The 2020 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include data for 372 religious bodies or groups. Of these, the ASARB was able to gather data on congregations and adherents for 217 and on congregations only for 155.

[More information on the data sources]

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