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Middlesex 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 18 46,647 284.01
Non-denominational Christian Churches Evangelical Protestant Other Groups Family 25 10,050 61.19
United Church of Christ Mainline Protestant Congregationalists (United Church of Christ) Family 18 3,419 20.82
Episcopal Church Mainline Protestant Anglican/Episcopal Family 12 1,998 12.16
Hindu, Traditional Temples Hinduism Hinduism Family 1 1,800 10.96
Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 6 1,387 8.44
American Baptist Churches in the U.S.A. Mainline Protestant Baptist Family 6 1,045 6.36
United Methodist Church Mainline Protestant Methodist Family 7 1,004 6.11
Jehovah's Witnesses Jehovah's Witnesses Adventist Family 4 1,002 6.10
Muslim Estimate Islam Islam Family 2 775 4.72
African Methodist Episcopal Zion Church Black Protestant Methodist Family 1 600 3.65
National Baptist Convention, USA, Inc. Black Protestant Baptist Family 3 580 3.53
Reform Judaism Judaism Judaism Family 1 518 3.15
Lutheran Church-Missouri Synod (LCMS) Evangelical Protestant Lutheran Family 1 429 2.61
Conservative Judaism Judaism Judaism Family 1 419 2.55
Church of Jesus Christ of Latter-day Saints Latter-day Saints Latter-day Saints (Mormonism) Family 1 376 2.29
Assemblies of God, General Council of the Evangelical Protestant Pentecostal Family 3 279 1.70
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian/Reformed Family 1 273 1.66
Evangelical Covenant Church Evangelical Protestant Methodist Family 2 212 1.29
Full Gospel Baptist Church Fellowship International Black Protestant Baptist Family 1 180 1.10
National Association of Congregational Christian Churches Mainline Protestant Congregationalists (United Church of Christ) Family 1 137 0.83
Hindu Yoga and Meditation Hinduism 2 119 0.72
Salvation Army Evangelical Protestant Holiness Family 1 81 0.49
Bible Way Church of Our Lord Jesus Christ World Wide, Inc. Evangelical Protestant Pentecostal Family 1 80 0.49
Baha'i Faith Other Other Groups Family 0 47 0.29
Orthodox Church in America, The Orthodox Eastern Liturgical (Orthodox) Family 1 46 0.28
Seventh-day Adventist Church Evangelical Protestant Adventist Family 1 38 0.23
Seventh Day Baptist General Conference of the United States and Canada Evangelical Protestant Baptist Family 1 24 0.15
Friends General Conference and Friends United Meeting, dually aligned meetings Mainline Protestant Friends/Brethren Family 1 22 0.13
Converge Worldwide Evangelical Protestant Baptist Family 1
Anglican Church in America Mainline Protestant Anglican/Episcopal Family 1
Grace Communion International Evangelical Protestant 1
Elim Fellowship Evangelical Protestant Pentecostal Family 2
Evangelical Free Church of America Evangelical Protestant Methodist Family 1
Unity Churches, Association of Other Christians Other Groups Family 1
United Pentecostal Church International Evangelical Protestant Pentecostal Family 1
Buddhism, Mahayana Buddhism Buddhism Family 1

Religious Traditions (1980 - 2020), Percent of Population

The population of this county was 164,245 in 2020. The adherent totals of the religious groups listed above (73,587) included 44.8% 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

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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