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Suffolk County, Massachusetts

Religious Traditions, 2010

48,562 4,176 20,380 7,693 332,744 29,094 279,374
Evangelical Protestant Black Protestant Mainline Protestant Orthodox Catholic 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
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 7 6,955 10.5
Albanian Orthodox Diocese of America Orthodox Eastern Liturgical (Orthodox) 1 --- ---
American Baptist Churches in the USA Mainline Protestant Baptist 35 11,158 16.8
Assemblies of God Evangelical Protestant Pentecostal 9 1,940 2.9
Black Baptists Estimate Evangelical Protestant Baptist --- 34,183 51.5
Catholic Church Catholic Catholicism 80 173,825 261.8
Christian and Missionary Alliance, The Evangelical Protestant Holiness 5 490 0.7
Christian Brethren Evangelical Protestant Ind. Fundamentalist 3 217 0.3
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 1 0 ---
Church of Christ, Scientist Other Christian Science 4 --- ---
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 2 975 1.5
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 6 924 1.4
Church of God of Prophecy Evangelical Protestant Pentecostal 5 166 0.3
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 1 129 0.2
Church of the Nazarene Evangelical Protestant Holiness 3 199 0.3
Churches of Christ Evangelical Protestant Restoration Movement 4 4,443 6.7
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed 1 408 0.6
Conservative Baptist Association of America Evangelical Protestant Baptist 6 --- ---
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed 4 2,220 3.3
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 2 307 0.5
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 25 12,183 18.4
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist --- --- ---
Evangelical Lutheran Church in America Mainline Protestant Lutheran 6 1,037 1.6
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 1 4 0.0
Free Methodist Church of North America Evangelical Protestant Holiness 1 13 0.0
Friends (Quakers) Mainline Protestant European Free-Church 2 70 0.1
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 3 --- ---
Independent, Charismatic Churches Evangelical Protestant Pentecostal --- --- ---
Independent, Non-Charismatic Churches Evangelical Protestant
1 600 0.9
Jewish Other Judaism 27 40,005 60.3
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran 2 883 1.3
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 2 685 1.0
Mennonite Church USA Evangelical Protestant European Free-Church 3 124 0.2
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 2 2,170 3.3
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 2 --- ---
Orthodox Church in America: Albanian Orthodox Archdiocese Orthodox Eastern Liturgical (Orthodox) 2 --- ---
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 6 353 0.5
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 1 0 ---
Salvation Army Evangelical Protestant Holiness 3 362 0.5
Seventh-day Adventist Church Evangelical Protestant Adventist 4 537 0.8
Southern Baptist Convention Evangelical Protestant Baptist 12 3,785 5.7
Syriac Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) 1 600 0.9
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) --- --- ---
Unitarian Universalist Association of Congregations Other Liberal 10 4,517 6.8
United Church of Christ Mainline Protestant Presbyterian-Reformed 19 2,987 4.5
United Methodist Church, The Mainline Protestant Methodist/Pietist 10 2,361 3.6
Wesleyan Church, The Evangelical Protestant Holiness 1 25 0.0
Totals: 325 311,840  

The population of Suffolk County, Massachusetts was 663,906 in 1990; in 1980 it was 650,142. The total population changed 2.1%. The adherent totals of the religious groups listed above (311,840) included 47.0% of the total population in 1990.

* 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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