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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
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 3 2,037 14.23
American Baptist Churches in the USA Mainline Protestant Baptist 5 945 6.60
Assemblies of God Evangelical Protestant Pentecostal 3 205 1.43
Black Baptists Estimate Evangelical Protestant Baptist --- 1,404 9.80
Catholic Church Catholic Catholicism 18 51,948 362.78
Church of Christ, Scientist Other Christian Science 2 --- ---
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 1 25 0.17
Churches of Christ Evangelical Protestant Baptist 1 50 0.35
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed 1 1,078 7.53
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 12 3,795 26.50
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 1 214 1.49
Evangelical Lutheran Church in America Mainline Protestant Lutheran 6 2,030 14.18
Friends (Quakers) Mainline Protestant European Free-Church 1 31 0.22
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 2 --- ---
Independent, Non-Charismatic Churches Evangelical Protestant
1 320 2.23
Jewish Other Judaism 3 2,775 19.38
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 1 332 2.32
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 2 381 2.66
Salvation Army Evangelical Protestant Holiness 1 45 0.31
Seventh Day Baptist General Conference, USA and Canada Evangelical Protestant Baptist 1 36 0.25
Seventh-day Adventist Church Evangelical Protestant Adventist 1 30 0.21
Southern Baptist Convention Evangelical Protestant Baptist 2 174 1.22
United Church of Christ Mainline Protestant Presbyterian-Reformed 18 8,145 56.88
United Methodist Church, The Mainline Protestant Methodist/Pietist 8 2,610 18.23
Totals: 94 78,610  

The population of Middlesex County, Connecticut was 143,196 in 1990; in 1980 it was 129,017. The total population changed 11.0%. The adherent totals of the religious groups listed above (78,610) included 54.9% 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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