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Connecticut - State Membership Report (2020)

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 354 1,024,927 284.23
Non-denominational Christian Churches Evangelical Protestant Other Groups Family 487 171,418 47.54
United Church of Christ Mainline Protestant Congregationalists (United Church of Christ) Family 230 63,868 17.71
American Baptist Churches in the U.S.A. Mainline Protestant Baptist Family 115 44,638 12.38
Muslim Estimate Islam Islam Family 49 43,905 12.18
Episcopal Church Mainline Protestant Anglican/Episcopal Family 156 43,373 12.03
United Methodist Church Mainline Protestant Methodist Family 114 34,848 9.66
Jehovah's Witnesses Jehovah's Witnesses Adventist Family 133 32,126 8.91
National Baptist Convention, USA, Inc. Black Protestant Baptist Family 23 25,660 7.12
Assemblies of God, General Council of the Evangelical Protestant Pentecostal Family 99 22,475 6.23
Reform Judaism Judaism Judaism Family 19 16,017 4.44
Church of Jesus Christ of Latter-day Saints Latter-day Saints Latter-day Saints (Mormonism) Family 36 15,946 4.42
Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 66 14,812 4.11
Conservative Judaism Judaism Judaism Family 21 13,868 3.85
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) Family 15 11,740 3.26
Seventh-day Adventist Church Evangelical Protestant Adventist Family 63 11,505 3.19
Orthodox Judaism Judaism Judaism Family 20 8,160 2.26
Southern Baptist Convention Evangelical Protestant Baptist Family 72 7,447 2.07
Lutheran Church-Missouri Synod (LCMS) Evangelical Protestant Lutheran Family 36 7,412 2.06
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal Family 67 7,010 1.94
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian/Reformed Family 16 5,977 1.66
African Methodist Episcopal Zion Church Black Protestant Methodist Family 22 5,643 1.56
Hindu, Traditional Temples Hinduism Hinduism Family 4 5,262 1.46
Buddhism, Mahayana Buddhism Buddhism Family 9 5,010 1.39
Church of God in Christ Black Protestant Pentecostal Family 27 4,978 1.38
African Methodist Episcopal Church Black Protestant Methodist Family 11 4,506 1.25
National Missionary Baptist Convention of America Black Protestant Baptist Family 16 4,150 1.15
Hindu Yoga and Meditation Hinduism 21 3,677 1.02
Church of the Nazarene Evangelical Protestant Holiness Family 21 2,821 0.78
Unitarian Universalist Association Other Christians Liberal Family 18 2,740 0.76
Salvation Army Evangelical Protestant Holiness Family 19 2,680 0.74
Evangelical Covenant Church Evangelical Protestant Methodist Family 13 2,614 0.72
Orthodox Church in America, The Orthodox Eastern Liturgical (Orthodox) Family 18 2,529 0.70
Pentecostal Assemblies of the World Black Protestant Pentecostal Family 6 2,404 0.67
Church of our Lord Jesus Christ of the Apostolic Faith, Inc. Black Protestant Pentecostal Family 13 2,232 0.62
Christian Methodist Episcopal Church Black Protestant Methodist Family 8 2,110 0.59
Churches of Christ Evangelical Protestant Restorationists Family 21 1,940 0.54
Free Methodist Church – USA Evangelical Protestant Holiness Family 9 1,814 0.50
National Association of Congregational Christian Churches Mainline Protestant Congregationalists (United Church of Christ) Family 21 1,792 0.50
Buddhism, Theravada Buddhism Buddhism Family 5 1,730 0.48
National Baptist Convention of America International, Inc. Black Protestant Baptist Family 2 1,700 0.47
Christian and Missionary Alliance Evangelical Protestant Holiness Family 15 1,624 0.45
Presbyterian Church in America Evangelical Protestant Presbyterian/Reformed Family 11 1,381 0.38
Baha'i Faith Other Other Groups Family 5 1,020 0.28
Full Gospel Christian Assemblies International Evangelical Protestant Pentecostal Family 7 896 0.25
Armenian Apostolic Church (Catholicosate of Etchmiadzin) Orthodox Eastern Liturgical (Orthodox) Family 3 870 0.24
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian/Reformed Family 12 832 0.23
Coptic Orthodox Church Orthodox Eastern Liturgical (Orthodox) Family 4 751 0.21
International Churches of Christ Evangelical Protestant Baptist Family 3 745 0.21
Apostolic Christian Church of America Evangelical Protestant Froehlich Churches Family 1 685 0.19
Christian Churches and Churches of Christ Evangelical Protestant Restorationists Family 7 674 0.19
United House of Prayer Black Protestant 4 630 0.17
Ukrainian Orthodox Church of the U.S.A. Orthodox Eastern Liturgical (Orthodox) Family 3 630 0.17
United Holy Church of America Black Protestant Pentecostal Family 7 574 0.16
American Carpatho-Russian Orthodox Diocese of the USA Orthodox Eastern Liturgical (Orthodox) Family 4 546 0.15
Full Gospel Baptist Church Fellowship International Black Protestant Baptist Family 3 540 0.15
Antiochian Orthodox Christian Archdiocese of North America Orthodox Eastern Liturgical (Orthodox) Family 2 530 0.15
Friends General Conference and Friends United Meeting, dually aligned meetings Mainline Protestant Friends/Brethren Family 8 484 0.13
Association of Vineyard Churches Evangelical Protestant Pentecostal Family 2 470 0.13
Buddhism, Vajrayana Buddhism Buddhism Family 3 455 0.13
Progressive National Baptist Convention, Inc. Black Protestant Baptist Family 2 430 0.12
Church of God (Anderson, Indiana) Evangelical Protestant Holiness Family 3 420 0.12
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian/Reformed Family 4 412 0.11
Russian Orthodox Church Outside of Russia, The Orthodox Eastern Liturgical (Orthodox) Family 5 360 0.10
Wesleyan Church Evangelical Protestant Holiness Family 3 344 0.10
North American and Europe Region of the Knanaya Archdiocese of the Syriac Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) Family 1 280 0.08
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran Family 2 278 0.08
Advent Christian Church Evangelical Protestant Adventist Family 5 259 0.07
Christian Reformed Church in North America Evangelical Protestant Presbyterian/Reformed Family 1 246 0.07
Reconstructionist Judaism Judaism Judaism Family 1 243 0.07
Romanian Orthodox Metropolia of the Americas Orthodox Eastern Liturgical (Orthodox) Family 1 200 0.06
Lutheran Congregations in Mission for Christ Evangelical Protestant Lutheran Family 2 200 0.06
International Church of the Foursquare Gospel Evangelical Protestant Pentecostal Family 3 164 0.05
Bible Way Church of Our Lord Jesus Christ World Wide, Inc. Evangelical Protestant Pentecostal Family 2 160 0.04
Christian Church (Disciples of Christ) Mainline Protestant Restorationists Family 3 120 0.03
Malankara (Indian) Orthodox Syrian Church Orthodox Eastern Liturgical (Orthodox) Family 1 83 0.02
Armenian Apostolic Church (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) Family 1 60 0.02
Universal Fellowship of Metropolitan Community Churches Mainline Protestant Other Groups Family 1 46 0.01
Seventh Day Baptist General Conference of the United States and Canada Evangelical Protestant Baptist Family 2 31 0.01
Georgian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) Family 1 30 0.01
Open Bible Churches Evangelical Protestant Pentecostal Family 1 8 0.00
Apostolic Christian Faith Evangelical Protestant Froehlich Churches Family 1 4 0.00
Church of God in Christ, Mennonite Evangelical Protestant Mennonite/Amish Family 1 0 0.00
Evangelical Association of Reformed and Congregational Christian Churches Evangelical Protestant Presbyterian/Reformed Family 1
International Fellowship of Bible Churches Evangelical Protestant Holiness Family 1
Christadelphians Other Christians Other Groups Family 1
ECO: A Covenant Order of Evangelical Presbyterians Evangelical Protestant Presbyterian/Reformed Family 2
Anglican Church in America Mainline Protestant Anglican/Episcopal Family 1
Diocese of the Holy Cross Mainline Protestant 1
Episcopal Missionary Church Mainline Protestant 2
Holy Catholic Church Anglican Rite Mainline Protestant 1
Higher Ground Always Abounding Assemblies Evangelical Protestant 10
Grace Communion International Evangelical Protestant 2
United Church of God Other Christians Adventist Family 1
Vedanta Society Other Other Groups Family 1
Church of God and Saints of Christ Other Christians Judaism Family 2
House of God, Holy Church of the Living God, The Pillar and Ground of the Truth, House of Prayer for All People Black Protestant 1
Anglican Catholic Church Other Christians Anglican/Episcopal Family 2
Christian Congregation in North America Evangelical Protestant Pentecostal Family 3
The Church of God Evangelical Protestant 1
The Local Churches Evangelical Protestant 4
Chabad Judaism Judaism 18
Union American Methodist Episcopal Church Black Protestant Methodist Family 2
Alliance of Baptists Mainline Protestant Baptist Family 1
Anglican Church in North America Evangelical Protestant Anglican/Episcopal Family 9
Converge Worldwide Evangelical Protestant Baptist Family 23
Calvary Chapel Evangelical Protestant Pentecostal Family 3
Church of Christ, Scientist Other Christians Christian Science Family 6
Unity Churches, Association of Other Christians Other Groups Family 5
General Conference of the Church of God (Seventh Day) Evangelical Protestant Adventist Family 1
Church of God of Prophecy Evangelical Protestant Pentecostal Family 8
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran Family 2
Community of Christ Evangelical Protestant Latter-day Saints (Mormonism) Family 3
Conservative Baptist Association of America (CBAmerica) Evangelical Protestant Baptist Family 13
Elim Fellowship Evangelical Protestant Pentecostal Family 7
Evangelical Free Church of America Evangelical Protestant Methodist Family 22
Evangelical Presbyterian Church (1981) Evangelical Protestant Presbyterian/Reformed Family 1
General Church of the New Jerusalem Other Christians Spiritualist Family 1
International Fellowship of Christian Assemblies Evangelical Protestant Pentecostal Family 2
International Pentecostal Church of Christ Evangelical Protestant Pentecostal Family 1
Jain Other Other Groups Family 2
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 1
National Spiritualist Association of Churches Other Spiritualist Family 6
New Apostolic Church USA Other Christians Other Groups Family 3
Orthodox Presbyterian Church Evangelical Protestant Presbyterian/Reformed Family 1
Pentecostal Church of God Evangelical Protestant Pentecostal Family 3
Pentecostal Fire-Baptized Holiness Church Evangelical Protestant Pentecostal Family 5
Polish National Catholic Church of America Catholic Catholic Liturgical Family 7
Christian Brethren (Plymouth Brethren) Evangelical Protestant Independent Fundamentalist Family 18
General Association of Regular Baptist Churches Evangelical Protestant Baptist Family 3
American Sikh Council Other Other Groups Family 7
Tao Other Other Groups Family 1
Union of Messianic Jewish Congregations Other Christians Other Groups Family 2
United Pentecostal Church International Evangelical Protestant Pentecostal Family 39
           

Religious Traditions (1980 - 2020), Percent of Population


The population of this state was 3,605,944 in 2020. The adherent totals of the religious groups listed above (1,708,179) included 47.4% of the total population in 2020. 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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