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Middlesex County (Connecticut)

Religious Traditions, 2010

3,978 974 15,015 46,800 85 2,921 95,903
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
Catholic Church Catholic Catholicism 19 48,212 373.69
United Church of Christ Mainline Protestant Presbyterian-Reformed 17 7,093 54.98
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 12 3,934 30.49
United Methodist Church, The Mainline Protestant Methodist/Pietist 8 2,765 21.43
Evangelical Lutheran Church in America Mainline Protestant Lutheran 8 2,555 19.80
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 3 1,917 14.86
American Baptist Churches in the USA Mainline Protestant Baptist 5 1,207 9.36
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 4 915 7.09
Jewish Other Judaism 3 374 2.90
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 1 326 2.53
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 2 286 2.22
Salvation Army Evangelical Protestant Holiness 1 213 1.65
Conservative Baptist Association of America Evangelical Protestant Baptist 1 133 1.03
Christian and Missionary Alliance, The Evangelical Protestant Holiness 1 125 0.97
Assemblies of God Evangelical Protestant Pentecostal 2 110 0.85
Seventh-day Adventist Church Evangelical Protestant Adventist 1 78 0.60
Southern Baptist Convention Evangelical Protestant Baptist 1 74 0.57
Friends (Quakers) Mainline Protestant European Free-Church 1 42 0.33
Christian Brethren Evangelical Protestant Ind. Fundamentalist 1 40 0.31
Seventh Day Baptist General Conference, USA and Canada Evangelical Protestant Baptist 1 36 0.28
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 1 15 0.12
Black Baptists Estimate Evangelical Protestant Baptist 0 0 0.00
Church of Christ, Scientist Other Christian Science 0 0 0.00
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed 0 0 0.00
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 0 0 0.00
Independent, Non-Charismatic Churches Evangelical Protestant
0 0 0.00
Totals: 93 70,450  

The population of Middlesex County, Connecticut was 129,017 in 1980. The adherent totals of the religious groups listed above (70,450) included 54.6% 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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