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Hartford County (Connecticut)

Religious Traditions, 2010

50,619 8,446 73,522 278,203 3,665 28,183 451,376
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 99 382,719 449.32
United Church of Christ Mainline Protestant Presbyterian-Reformed 58 39,603 46.49
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 38 17,628 20.70
American Baptist Churches in the USA Mainline Protestant Baptist 32 14,885 17.48
Jewish Other Judaism 32 26,200 30.76
United Methodist Church, The Mainline Protestant Methodist/Pietist 32 14,721 17.28
Evangelical Lutheran Church in America Mainline Protestant Lutheran 24 13,523 15.88
Assemblies of God Evangelical Protestant Pentecostal 15 2,954 3.47
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 9 7,064 8.29
Churches of Christ Evangelical Protestant Baptist 9 707 0.83
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 8 1,395 1.64
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 8 4,644 5.45
Southern Baptist Convention Evangelical Protestant Baptist 8 1,920 2.25
Church of the Nazarene Evangelical Protestant Holiness 7 953 1.12
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 7 1,318 1.55
Seventh-day Adventist Church Evangelical Protestant Adventist 7 2,049 2.41
Christian Brethren Evangelical Protestant Ind. Fundamentalist 6 435 0.51
Independent, Charismatic Churches Evangelical Protestant Pentecostal 6 3,090 3.63
Church of Christ, Scientist Other Christian Science 5 --- ---
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 5 1,486 1.74
Salvation Army Evangelical Protestant Holiness 5 561 0.66
Unitarian Universalist Association of Congregations Other Liberal 5 1,678 1.97
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 4 1,465 1.72
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 4 --- ---
Advent Christian Church Evangelical Protestant Adventist 3 196 0.23
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 3 540 0.63
Independent, Non-Charismatic Churches Evangelical Protestant
3 1,020 1.20
Christian and Missionary Alliance, The Evangelical Protestant Holiness 2 146 0.17
Christian Churches and Churches of Christ Evangelical Protestant Baptist 2 243 0.29
Church of God of Prophecy Evangelical Protestant Pentecostal 2 68 0.08
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran 2 164 0.19
Conservative Baptist Association of America Evangelical Protestant Baptist 2 --- ---
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 2 1,941 2.28
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 2 --- ---
Apostolic Catholic Assyrian Church of the East, North American Dioceses Orthodox Eastern Liturgical (Orthodox) 1 379 0.44
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) 1 1,600 1.88
Christ Catholic Church Evangelical Protestant Catholicism 1 4 0.00
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 1 263 0.31
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 1 70 0.08
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed 1 201 0.24
Estonian Evangelical Lutheran Church Mainline Protestant Lutheran 1 690 0.81
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 1 16 0.02
Friends (Quakers) Mainline Protestant European Free-Church 1 247 0.29
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 1 --- ---
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran 1 198 0.23
Mennonite Church USA Evangelical Protestant European Free-Church 1 57 0.07
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 1 --- ---
Pentecostal Church of God Evangelical Protestant Pentecostal 1 85 0.10
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 1 80 0.09
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 1 127 0.15
Black Baptists Estimate Evangelical Protestant Baptist --- 20,569 24.15
Totals: 472 569,902  

The population of Hartford County, Connecticut was 851,783 in 1990; in 1980 it was 807,766. The total population changed 5.4%. The adherent totals of the religious groups listed above (569,902) included 66.9% 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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