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New Haven County, Connecticut - County 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 77 258,278 298.64
Non-denominational Christian Churches Evangelical Protestant Other Groups Family 140 41,376 47.84
United Church of Christ Mainline Protestant Congregationalists (United Church of Christ) Family 45 12,147 14.05
Episcopal Church Mainline Protestant Anglican/Episcopal Family 37 8,720 10.08
Jehovah's Witnesses Jehovah's Witnesses Adventist Family 30 7,928 9.17
Muslim Estimate Islam Islam Family 13 7,565 8.75
United Methodist Church Mainline Protestant Methodist Family 19 7,099 8.21
American Baptist Churches in the U.S.A. Mainline Protestant Baptist Family 19 6,752 7.81
Assemblies of God, General Council of the Evangelical Protestant Pentecostal Family 27 5,031 5.82
Church of Jesus Christ of Latter-day Saints Latter-day Saints Latter-day Saints (Mormonism) Family 8 3,608 4.17
Conservative Judaism Judaism Judaism Family 4 3,515 4.06
Reform Judaism Judaism Judaism Family 5 3,386 3.92
Buddhism, Mahayana Buddhism Buddhism Family 3 3,051 3.53
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) Family 3 2,500 2.89
Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 13 2,470 2.86
Church of God in Christ Black Protestant Pentecostal Family 12 2,440 2.82
African Methodist Episcopal Zion Church Black Protestant Methodist Family 7 2,384 2.76
Seventh-day Adventist Church Evangelical Protestant Adventist Family 16 2,313 2.67
National Baptist Convention, USA, Inc. Black Protestant Baptist Family 3 2,000 2.31
Hindu, Traditional Temples Hinduism Hinduism Family 1 1,731 2.00
Orthodox Judaism Judaism Judaism Family 7 1,700 1.97
Lutheran Church-Missouri Synod (LCMS) Evangelical Protestant Lutheran Family 7 1,397 1.62
Southern Baptist Convention Evangelical Protestant Baptist Family 12 1,214 1.40
National Missionary Baptist Convention of America Black Protestant Baptist Family 5 1,120 1.30
Orthodox Church in America, The Orthodox Eastern Liturgical (Orthodox) Family 5 917 1.06
Church of our Lord Jesus Christ of the Apostolic Faith, Inc. Black Protestant Pentecostal Family 5 900 1.04
African Methodist Episcopal Church Black Protestant Methodist Family 2 876 1.01
Pentecostal Assemblies of the World Black Protestant Pentecostal Family 3 814 0.94
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian/Reformed Family 4 722 0.83
Hindu Yoga and Meditation Hinduism 5 702 0.81
National Baptist Convention of America International, Inc. Black Protestant Baptist Family 1 700 0.81
Christian and Missionary Alliance Evangelical Protestant Holiness Family 5 619 0.72
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal Family 18 565 0.65
Unitarian Universalist Association Other Christians Liberal Family 4 562 0.65
Salvation Army Evangelical Protestant Holiness Family 4 538 0.62
Coptic Orthodox Church Orthodox Eastern Liturgical (Orthodox) Family 2 500 0.58
Churches of Christ Evangelical Protestant Restorationists Family 5 485 0.56
Association of Vineyard Churches Evangelical Protestant Pentecostal Family 2 470 0.54
Progressive National Baptist Convention, Inc. Black Protestant Baptist Family 2 430 0.50
Christian Churches and Churches of Christ Evangelical Protestant Restorationists Family 4 411 0.48
Presbyterian Church in America Evangelical Protestant Presbyterian/Reformed Family 1 319 0.37
United House of Prayer Black Protestant 1 250 0.29
Church of the Nazarene Evangelical Protestant Holiness Family 3 226 0.26
United Holy Church of America Black Protestant Pentecostal Family 5 216 0.25
Evangelical Covenant Church Evangelical Protestant Methodist Family 2 196 0.23
National Association of Congregational Christian Churches Mainline Protestant Congregationalists (United Church of Christ) Family 2 189 0.22
Full Gospel Baptist Church Fellowship International Black Protestant Baptist Family 1 180 0.21
Christian Methodist Episcopal Church Black Protestant Methodist Family 1 180 0.21
Baha'i Faith Other Other Groups Family 1 179 0.21
Church of God (Anderson, Indiana) Evangelical Protestant Holiness Family 2 160 0.19
Wesleyan Church Evangelical Protestant Holiness Family 1 143 0.17
Friends General Conference and Friends United Meeting, dually aligned meetings Mainline Protestant Friends/Brethren Family 2 105 0.12
Full Gospel Christian Assemblies International Evangelical Protestant Pentecostal Family 1 90 0.10
Bible Way Church of Our Lord Jesus Christ World Wide, Inc. Evangelical Protestant Pentecostal Family 1 80 0.09
Buddhism, Vajrayana Buddhism Buddhism Family 1 80 0.09
International Church of the Foursquare Gospel Evangelical Protestant Pentecostal Family 1 66 0.08
Ukrainian Orthodox Church of the U.S.A. Orthodox Eastern Liturgical (Orthodox) Family 1 60 0.07
Advent Christian Church Evangelical Protestant Adventist Family 1 40 0.05
Christian Church (Disciples of Christ) Mainline Protestant Restorationists Family 1 0 0.00
Union American Methodist Episcopal Church Black Protestant Methodist Family 2
Christadelphians Other Christians Other Groups Family 1
Holy Catholic Church Anglican Rite Mainline Protestant 1
Vedanta Society Other Other Groups Family 1
Higher Ground Always Abounding Assemblies Evangelical Protestant 4
Chabad Judaism Judaism 5
Anglican Catholic Church Other Christians Anglican/Episcopal Family 2
The Local Churches Evangelical Protestant 2
Grace Communion International Evangelical Protestant 1
General Association of Regular Baptist Churches Evangelical Protestant Baptist Family 1
Church of God and Saints of Christ Other Christians Judaism Family 1
Christian Congregation in North America Evangelical Protestant Pentecostal Family 1
Anglican Church in North America Evangelical Protestant Anglican/Episcopal Family 3
Converge Worldwide Evangelical Protestant Baptist Family 6
Calvary Chapel Evangelical Protestant Pentecostal Family 2
Church of Christ, Scientist Other Christians Christian Science Family 1
Church of God of Prophecy Evangelical Protestant Pentecostal Family 2
Conservative Baptist Association of America (CBAmerica) Evangelical Protestant Baptist Family 1
Elim Fellowship Evangelical Protestant Pentecostal Family 2
Evangelical Free Church of America Evangelical Protestant Methodist Family 5
International Fellowship of Christian Assemblies Evangelical Protestant Pentecostal Family 1
New Apostolic Church USA Other Christians Other Groups Family 2
Orthodox Presbyterian Church Evangelical Protestant Presbyterian/Reformed Family 1
Pentecostal Church of God Evangelical Protestant Pentecostal Family 1
Pentecostal Fire-Baptized Holiness Church Evangelical Protestant Pentecostal Family 1
Polish National Catholic Church of America Catholic Catholic Liturgical Family 3
Christian Brethren (Plymouth Brethren) Evangelical Protestant Independent Fundamentalist Family 5
American Sikh Council Other Other Groups Family 2
Union of Messianic Jewish Congregations Other Christians Other Groups Family 1
United Pentecostal Church International Evangelical Protestant Pentecostal Family 8
           

Religious Traditions (1980 - 2020), Percent of Population


The population of this county was 864,835 in 2020. The adherent totals of the religious groups listed above (402,695) included 46.6% 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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