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Suffolk County, Massachusetts - 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 54 329,380 412.79
Muslim Estimate Islam Islam Family 15 45,658 57.22
Non-denominational Christian Churches Evangelical Protestant Other Groups Family 47 15,980 20.03
Jehovah's Witnesses Jehovah's Witnesses Adventist Family 31 7,254 9.09
Seventh-day Adventist Church Evangelical Protestant Adventist Family 19 6,679 8.37
Episcopal Church Mainline Protestant Anglican/Episcopal Family 20 6,577 8.24
American Baptist Churches in the U.S.A. Mainline Protestant Baptist Family 41 6,227 7.80
Unitarian Universalist Association Other Christians Liberal Family 9 4,628 5.80
Southern Baptist Convention Evangelical Protestant Baptist Family 38 4,586 5.75
Assemblies of God, General Council of the Evangelical Protestant Pentecostal Family 14 3,687 4.62
Church of Jesus Christ of Latter-day Saints Latter-day Saints Latter-day Saints (Mormonism) Family 6 2,856 3.58
International Churches of Christ Evangelical Protestant Baptist Family 1 2,536 3.18
African Methodist Episcopal Church Black Protestant Methodist Family 6 2,534 3.18
Hindu Yoga and Meditation Hinduism 7 2,320 2.91
United Church of Christ Mainline Protestant Congregationalists (United Church of Christ) Family 13 1,978 2.48
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal Family 13 1,917 2.40
National Missionary Baptist Convention of America Black Protestant Baptist Family 6 1,880 2.36
Ethiopian Orthodox Church Orthodox Eastern Liturgical (Orthodox) Family 6 1,875 2.35
United Methodist Church Mainline Protestant Methodist Family 10 1,709 2.14
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian/Reformed Family 2 1,597 2.00
Antiochian Orthodox Christian Archdiocese of North America Orthodox Eastern Liturgical (Orthodox) Family 1 1,500 1.88
Orthodox Judaism Judaism Judaism Family 4 1,480 1.85
Church of God in Christ Black Protestant Pentecostal Family 7 1,358 1.70
Orthodox Church in America, The Orthodox Eastern Liturgical (Orthodox) Family 2 1,340 1.68
Buddhism, Vajrayana Buddhism Buddhism Family 6 1,180 1.48
Church of the Nazarene Evangelical Protestant Holiness Family 7 941 1.18
Coptic Orthodox Church Orthodox Eastern Liturgical (Orthodox) Family 1 625 0.78
Buddhism, Theravada Buddhism Buddhism Family 2 618 0.77
Salvation Army Evangelical Protestant Holiness Family 4 610 0.76
African Methodist Episcopal Zion Church Black Protestant Methodist Family 2 560 0.70
International Church of the Foursquare Gospel Evangelical Protestant Pentecostal Family 1 556 0.70
Church of our Lord Jesus Christ of the Apostolic Faith, Inc. Black Protestant Pentecostal Family 3 540 0.68
Lutheran Church-Missouri Synod (LCMS) Evangelical Protestant Lutheran Family 2 509 0.64
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) Family 2 480 0.60
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian/Reformed Family 4 416 0.52
Reconstructionist Judaism Judaism Judaism Family 1 410 0.51
Pentecostal Assemblies of the World Black Protestant Pentecostal Family 1 400 0.50
Churches of Christ Evangelical Protestant Restorationists Family 2 400 0.50
Baha'i Faith Other Other Groups Family 1 348 0.44
Ukrainian Orthodox Church of the U.S.A. Orthodox Eastern Liturgical (Orthodox) Family 1 320 0.40
Presbyterian Church in America Evangelical Protestant Presbyterian/Reformed Family 3 302 0.38
Russian Orthodox Church Outside of Russia, The Orthodox Eastern Liturgical (Orthodox) Family 1 300 0.38
Bulgarian Eastern Orthodox Diocese of the USA, Canada, and Australia Orthodox Eastern Liturgical (Orthodox) Family 1 250 0.31
Syrian (Syriac) Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) Family 1 250 0.31
Eritrean Orthodox Church Orthodox Eastern Liturgical (Orthodox) Family 1 235 0.29
Evangelical Covenant Church Evangelical Protestant Methodist Family 3 206 0.26
Holy Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) Family 1 200 0.25
Missionary Church, The Evangelical Protestant Holiness Family 7 185 0.23
Conservative Judaism Judaism Judaism Family 1 176 0.22
Christian and Missionary Alliance Evangelical Protestant Holiness Family 3 166 0.21
United Holy Church of America Black Protestant Pentecostal Family 2 155 0.19
Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 3 136 0.17
Free Methodist Church – USA Evangelical Protestant Holiness Family 2 103 0.13
United House of Prayer Black Protestant 1 100 0.13
Friends General Conference and Friends United Meeting, dually aligned meetings Mainline Protestant Friends/Brethren Family 1 92 0.12
Church of the United Brethren in Christ, USA Evangelical Protestant Methodist Family 1 75 0.09
Wesleyan Church Evangelical Protestant Holiness Family 2 75 0.09
Church of God (Anderson, Indiana) Evangelical Protestant Holiness Family 1 70 0.09
Buddhism, Mahayana Buddhism Buddhism Family 4 58 0.07
Hindu, Traditional Temples Hinduism Hinduism Family 1 25 0.03
Universal Fellowship of Metropolitan Community Churches Mainline Protestant Other Groups Family 1 25 0.03
Church of the Brethren Evangelical Protestant Friends/Brethren Family 1 0 0.00
Independent Judaism Judaism 1 0 0.00
Christian Church (Disciples of Christ) Mainline Protestant Restorationists Family 2 0 0.00
Christian Churches and Churches of Christ Evangelical Protestant Restorationists Family 1 0 0.00
Christian Reformed Church in North America Evangelical Protestant Presbyterian/Reformed Family 1 0 0.00
Vedanta Society Other Other Groups Family 1
Church of God and Saints of Christ Other Christians Judaism Family 1
The Local Churches Evangelical Protestant 1
Tao Other Other Groups Family 1
Alliance of Baptists Mainline Protestant Baptist Family 1
(Original) Church of God Evangelical Protestant Pentecostal Family 2
Anglican Church in North America Evangelical Protestant Anglican/Episcopal Family 1
Converge Worldwide Evangelical Protestant Baptist Family 2
Church of Christ, Scientist Other Christians Christian Science Family 1
General Conference of the Church of God (Seventh Day) Evangelical Protestant Adventist Family 2
Church of God of Prophecy Evangelical Protestant Pentecostal Family 5
Churches of Christ in Christian Union Evangelical Protestant Holiness Family 1
Conservative Baptist Association of America (CBAmerica) Evangelical Protestant Baptist Family 7
Evangelical Free Church of America Evangelical Protestant Methodist Family 1
International Fellowship of Christian Assemblies Evangelical Protestant Pentecostal Family 2
Pentecostal Fire-Baptized Holiness Church Evangelical Protestant Pentecostal Family 1
Christian Brethren (Plymouth Brethren) Evangelical Protestant Independent Fundamentalist Family 1
United Pentecostal Church International Evangelical Protestant Pentecostal Family 6
           

Religious Traditions (1980 - 2020), Percent of Population


The population of this county was 797,936 in 2020. The adherent totals of the religious groups listed above (469,633) included 58.9% 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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