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New London County (Connecticut)

Religious Traditions, 2010

9,320 2,594 18,993 84,765 2,456 5,022 150,905
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 33 78,979 309.77
United Church of Christ Mainline Protestant Presbyterian-Reformed 20 7,246 28.42
American Baptist Churches in the USA Mainline Protestant Baptist 21 5,965 23.40
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 11 4,884 19.16
Jewish Other Judaism 10 4,575 17.94
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 2 3,013 11.82
United Methodist Church, The Mainline Protestant Methodist/Pietist 12 2,973 11.66
Black Baptists Estimate Evangelical Protestant Baptist --- 2,898 11.37
Southern Baptist Convention Evangelical Protestant Baptist 4 2,717 10.66
Evangelical Lutheran Church in America Mainline Protestant Lutheran 2 1,375 5.39
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 11 1,322 5.19
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 3 1,172 4.60
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed 3 1,128 4.42
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 4 1,041 4.08
Assemblies of God Evangelical Protestant Pentecostal 9 886 3.48
Christian Brethren Evangelical Protestant Ind. Fundamentalist 1 700 2.75
Independent, Charismatic Churches Evangelical Protestant Pentecostal 1 600 2.35
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 2 395 1.55
Seventh-day Adventist Church Evangelical Protestant Adventist 3 395 1.55
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 2 380 1.49
Christian and Missionary Alliance, The Evangelical Protestant Holiness 1 309 1.21
Independent, Non-Charismatic Churches Evangelical Protestant
1 300 1.18
Unitarian Universalist Association of Congregations Other Liberal 2 266 1.04
Church of the Nazarene Evangelical Protestant Holiness 3 256 1.00
Salvation Army Evangelical Protestant Holiness 2 158 0.62
Churches of Christ Evangelical Protestant Baptist 3 121 0.47
Seventh Day Baptist General Conference, USA and Canada Evangelical Protestant Baptist 1 53 0.21
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 1 49 0.19
Christian Churches and Churches of Christ Evangelical Protestant Baptist 1 37 0.15
Church of God of Prophecy Evangelical Protestant Pentecostal 1 35 0.14
Friends (Quakers) Mainline Protestant European Free-Church 1 33 0.13
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 1 28 0.11
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 1 0 0.00
Church of Christ, Scientist Other Christian Science 2 --- ---
Conservative Baptist Association of America Evangelical Protestant Baptist 5 --- ---
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 2 --- ---
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 1 --- ---
Totals: 183 124,289  

The population of New London County, Connecticut was 254,957 in 1990; in 1980 it was 238,409. The total population changed 6.9%. The adherent totals of the religious groups listed above (124,289) included 48.7% 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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