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Suffolk County (Massachusetts)

Religious Traditions, 2010

48,562 4,176 20,380 332,744 7,693 29,094 279,374
Evangelical Protestant Black Protestant Mainline Protestant Catholic Orthodox Other Unclaimed

Congregational adherents include all full members, their children, and others who regularly attend services. The 2010 reports contain incomplete counts of congregations and adherents belonging to the eight largest historically African-American denominations. These denominations are not included in the 2000 reports and are largely missing from the 1990 and 1980 reports.
[More information on the data sources]


Religious Bodies Tradition Family Congregations Adherents Adherence Rate
Independent, Non-Charismatic Churches Evangelical Protestant
0 0 0.00
Seventh-day Adventist Church Evangelical Protestant Adventist 6 1,366 2.10
American Baptist Churches in the USA Mainline Protestant Baptist 29 10,706 16.47
Black Baptists Estimate Evangelical Protestant Baptist 0 0 0.00
Churches of Christ Evangelical Protestant Baptist 2 325 0.50
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 2 263 0.40
Southern Baptist Convention Evangelical Protestant Baptist 1 318 0.49
Catholic Church Catholic Catholicism 88 414,332 637.29
Church of Christ, Scientist Other Christian Science 0 0 0.00
Albanian Orthodox Diocese of America Orthodox Eastern Liturgical (Orthodox) 0 0 0.00
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 0 0 0.00
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 0 0 0.00
Orthodox Church in America: Albanian Orthodox Archdiocese Orthodox Eastern Liturgical (Orthodox) 0 0 0.00
Syriac Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) 0 0 0.00
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 23 8,687 13.36
Mennonite Church, The General Conference Evangelical Protestant European Free-Church 1 50 0.08
Christian and Missionary Alliance, The Evangelical Protestant Holiness 2 167 0.26
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 2 519 0.80
Church of the Nazarene Evangelical Protestant Holiness 2 139 0.21
Salvation Army Evangelical Protestant Holiness 5 1,373 2.11
Wesleyan Church, The Evangelical Protestant Holiness 0 0 0.00
Christian Brethren Evangelical Protestant Ind. Fundamentalist 0 0 0.00
Jewish Other Judaism 3 3,993 6.14
Unitarian Universalist Association of Congregations Other Liberal 9 1,677 2.58
Evangelical Lutheran Church in America Mainline Protestant Lutheran 5 1,021 1.57
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran 2 506 0.78
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 3 736 1.13
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 7 6,955 10.70
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 1 311 0.48
United Methodist Church, The Mainline Protestant Methodist/Pietist 12 2,458 3.78
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 1 200 0.31
Assemblies of God Evangelical Protestant Pentecostal 7 909 1.40
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 5 612 0.94
Church of God of Prophecy Evangelical Protestant Pentecostal 0 0 0.00
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 0 0 0.00
Holiness Church of God, Inc., The Evangelical Protestant Pentecostal 1 23 0.04
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed 0 0 0.00
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed 5 3,160 4.86
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 2 3,198 4.92
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 6 522 0.80
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 0 0 0.00
United Church of Christ Mainline Protestant Presbyterian-Reformed 21 4,438 6.83
Swedenborgian Church Other Spiritualist 1 116 0.18
Totals: 254 469,080  

The population of Suffolk County, Massachusetts was 650,142 in 1980. The adherent totals of the religious groups listed above (469,080) included 72.2% of the total population in 1980.

* In an effort to better match the ASARB standards for adherents, a few religious bodies changed the way their adherents were reported in 2010, including the Catholic Church, Amish groups, Friends groups, Jewish groups, the Church of Jesus Christ of Latter-day Saints, Non-denominational Christian Churches, and the United Methodist Church. This change does not affect any of the data in the newly released 2010 U.S. Religion Census: Religious Congregations & Membership Study. In fact, the data for these groups are now more comparable to that of other bodies than it was in previous decadal reports.

However, the change in methodology can distort assessments on growth or decline between 2000 and 2010 for each of these groups. County-level 2000 data using the new methodology are not readily available. ASARB staff has adjusted some 2000 county-level adherent statistics to allow for a more accurate picture on growth or decline. The revised maps and charts are now available on-line at for those who are interested in these trends.


2010 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include statistics for 236 religious groups, providing information on the number of their congregations and adherents within each state and county in the United States. Clifford Grammich, Kirk Hadaway, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley and Richard H. Taylor supervised the collection. These data originally appeared in 2010 U.S. Religion Census: Religious Congregations & Membership Study, published by the Association of Statisticians of American Religious Bodies (ASARB). [More information on the data collection]

The adherence rate provides the number of adherents of a particular group per 1,000 population. For example, in 2010 the Episcopal Church had an adherence rate of 7.6 in Autauga County, Alabama. This means that about 8 out of every 1,000 people in Autauga County were Episcopalian.

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