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Middlesex County (Massachusetts)

Religious Traditions, 2010

41,270 2,276 70,053 718,209 23,641 68,480 579,156
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
Advent Christian Church Evangelical Protestant Adventist 2 254 0.19
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 2 335 0.25
American Baptist Association, The Evangelical Protestant Baptist 1 160 0.12
American Baptist Churches in the USA Mainline Protestant Baptist 61 18,747 13.71
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) 1 450 0.33
Assemblies of God Evangelical Protestant Pentecostal 9 1,727 1.26
Black Baptists Estimate Evangelical Protestant Baptist 0 0 0.00
Catholic Church Catholic Catholicism 145 863,634 631.76
Christian and Missionary Alliance, The Evangelical Protestant Holiness 1 67 0.05
Christian Brethren Evangelical Protestant Ind. Fundamentalist 4 495 0.36
Christian Churches and Churches of Christ Evangelical Protestant Baptist 11 124 0.09
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 1 137 0.10
Church of Christ, Scientist Other Christian Science 0 0 0.00
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 5 90 0.07
Church of God of Prophecy Evangelical Protestant Pentecostal 0 0 0.00
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 8 2,448 1.79
Church of the Nazarene Evangelical Protestant Holiness 10 2,519 1.84
Churches of Christ Evangelical Protestant Baptist 11 800 0.59
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 2 389 0.28
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 2 131 0.10
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 51 32,350 23.66
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 4 609 0.45
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 3 338 0.25
Evangelical Lutheran Church in America Mainline Protestant Lutheran 16 6,199 4.53
Evangelical Lutheran Synod Evangelical Protestant Lutheran 1 102 0.07
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 0 0 0.00
Friends (Quakers) Mainline Protestant European Free-Church 3 885 0.65
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 0 0 0.00
Independent, Non-Charismatic Churches Evangelical Protestant
0 0 0.00
Jewish Other Judaism 24 12,613 9.23
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 2 887 0.65
Mennonite Church Evangelical Protestant European Free-Church 1 51 0.04
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 0 30 0.02
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 1 148 0.11
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
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 8 1,825 1.34
Primitive Methodist Church in the USA Evangelical Protestant Methodist/Pietist 2 489 0.36
Reformed Church in America Mainline Protestant Presbyterian-Reformed 0 0 0.00
Reformed Presbyterian Church of North America Evangelical Protestant Presbyterian-Reformed 1 41 0.03
Salvation Army Evangelical Protestant Holiness 7 2,260 1.65
Seventh-day Adventist Church Evangelical Protestant Adventist 8 1,501 1.10
Southern Baptist Convention Evangelical Protestant Baptist 4 1,331 0.97
Swedenborgian Church Other Spiritualist 2 142 0.10
Unitarian Universalist Association of Congregations Other Liberal 39 8,832 6.46
United Church of Christ Mainline Protestant Presbyterian-Reformed 82 33,398 24.43
United Methodist Church, The Mainline Protestant Methodist/Pietist 50 20,698 15.14
Totals: 585 1,017,236  

The population of Middlesex County, Massachusetts was 1,367,034 in 1980. The adherent totals of the religious groups listed above (1,017,236) included 74.4% 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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