Connecticut

Religious Traditions, 2010

157,336	22,969	281,174	19,632	1,254,340	95,411	1,743,235
Evangelical Protestant	Black Protestant	Mainline Protestant	Orthodox	Catholic	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]

Reports

Religious Bodies	Tradition	Family	Congregations	Adherents	Adherence Rate^†
Catholic Church	Catholic	Catholicism	411	1,372,562	403.0
United Church of Christ	Mainline Protestant	Presbyterian-Reformed	253	124,770	36.6
Jewish	Other	Judaism	87	108,280	31.8
Episcopal Church	Mainline Protestant	Episcopalianism/Anglicanism	186	73,550	21.6
United Methodist Church, The	Mainline Protestant	Methodist/Pietist	133	51,183	15.0
American Baptist Churches in the USA	Mainline Protestant	Baptist	116	45,225	13.3
Evangelical Lutheran Church in America	Mainline Protestant	Lutheran	74	31,960	9.4
Muslim Estimate	Other	Other Groups	20	29,647	8.7
Assemblies of God	Evangelical Protestant	Pentecostal	84	14,632	4.3
Lutheran Church--Missouri Synod	Evangelical Protestant	Lutheran	37	13,317	3.9
Greek Orthodox Archdiocese of America	Orthodox	Eastern Liturgical (Orthodox)	14	10,635	3.1
Church of Jesus Christ of Latter-day Saints, The	Other	Latter-day Saints	34	9,593	2.8
Presbyterian Church (U.S.A.)	Mainline Protestant	Presbyterian-Reformed	20	8,952	2.6
Church of God (Cleveland, Tennessee)	Evangelical Protestant	Pentecostal	45	6,829	2.0
Seventh-day Adventist Church	Evangelical Protestant	Adventist	36	5,934	1.7
Southern Baptist Convention	Evangelical Protestant	Baptist	32	5,681	1.7
National Association of Congregational Christian Churches	Mainline Protestant	Presbyterian-Reformed	30	4,370	1.3
Unitarian Universalist Association of Congregations	Other	Liberal	19	4,022	1.2
Salvation Army	Evangelical Protestant	Holiness	23	3,890	1.1
Independent, Non-Charismatic Churches	Evangelical Protestant	----	7	3,740	1.1
Converge Worldwide/Baptist General Conference	Evangelical Protestant	Baptist	13	3,671	1.1
Evangelical Covenant Church, The	Evangelical Protestant	Methodist/Pietist	15	3,509	1.0
Evangelical Free Church of America, The	Evangelical Protestant	Methodist/Pietist	16	3,353	1.0
Orthodox Church in America	Orthodox	Eastern Liturgical (Orthodox)	15	2,549	0.7
Churches of Christ	Evangelical Protestant	Baptist	25	2,410	0.7
Ukrainian Orthodox Church of the USA	Orthodox	Eastern Liturgical (Orthodox)	5	2,049	0.6
Church of the Nazarene	Evangelical Protestant	Holiness	20	1,964	0.6
American Carpatho-Russian Orthodox Diocese	Orthodox	Eastern Liturgical (Orthodox)	4	1,913	0.6
Independent, Charismatic Churches	Evangelical Protestant	Pentecostal	1	1,800	0.5
Christian and Missionary Alliance, The	Evangelical Protestant	Holiness	19	1,773	0.5
Congregational Christian Churches, Additional (not part of any national CCC body)	Mainline Protestant	Presbyterian-Reformed	6	1,607	0.5
Conservative Baptist Association of America	Evangelical Protestant	Baptist	14	1,487	0.4
Antiochian Orthodox Christian Archdiocese of North America, The	Orthodox	Eastern Liturgical (Orthodox)	2	1,256	0.4
Armenian Church of North America (Catholicosate of Etchmiadzin)	Orthodox	Eastern Liturgical (Orthodox)	3	1,240	0.4
Bahá'í	Other	Other Groups	13	997	0.3
General Association of Regular Baptist Churches	Evangelical Protestant	Baptist	5	820	0.2
Conservative Congregational Christian Conference	Evangelical Protestant	Presbyterian-Reformed	6	699	0.2
Church of God of Prophecy	Evangelical Protestant	Pentecostal	7	678	0.2
International Churches of Christ	Evangelical Protestant	Baptist	3	678	0.2
Christian Church (Disciples of Christ)	Mainline Protestant	Baptist	4	595	0.2
Christian Reformed Church in North America	Evangelical Protestant	Presbyterian-Reformed	2	576	0.2
Apostolic Christian Church of America, Inc.	Evangelical Protestant	European Free-Church	1	575	0.2
Friends (Quakers)	Mainline Protestant	European Free-Church	10	558	0.2
Apostolic Catholic Assyrian Church of the East, North American Dioceses	Orthodox	Eastern Liturgical (Orthodox)	1	516	0.2
Free Methodist Church of North America	Evangelical Protestant	Holiness	2	508	0.1
Presbyterian Church in America	Evangelical Protestant	Presbyterian-Reformed	6	458	0.1
Christian Churches and Churches of Christ	Evangelical Protestant	Baptist	7	428	0.1
Armenian Apostolic Church of America (Catholicosate of Cilicia)	Orthodox	Eastern Liturgical (Orthodox)	1	420	0.1
Wesleyan Church, The	Evangelical Protestant	Holiness	2	420	0.1
Vineyard USA	Evangelical Protestant	Pentecostal	3	384	0.1
Foursquare Gospel, International Church of the	Evangelical Protestant	Pentecostal	5	339	0.1
Orthodox Church in America: Romanian Orthodox Episcopate of America	Orthodox	Eastern Liturgical (Orthodox)	1	312	0.1
Wisconsin Evangelical Lutheran Synod	Evangelical Protestant	Lutheran	2	282	0.1
Community of Christ	Other	Latter-day Saints	4	266	0.1
Mennonite Church USA	Evangelical Protestant	European Free-Church	3	231	0.1
Orthodox Church in America: Albanian Orthodox Archdiocese	Orthodox	Eastern Liturgical (Orthodox)	1	225	0.1
Orthodox Presbyterian Church, The	Evangelical Protestant	Presbyterian-Reformed	2	219	0.1
Church of God (Anderson, Indiana)	Evangelical Protestant	Holiness	2	180	0.1
Metropolitan Community Churches, Universal Fellowship of	Mainline Protestant	Other Groups	2	118	0.0
Pentecostal Church of God	Evangelical Protestant	Pentecostal	1	80	0.0
International Pentecostal Church of Christ	Evangelical Protestant	Pentecostal	1	75	0.0
International Council of Community Churches	Mainline Protestant	Presbyterian-Reformed	1	40	0.0
Apostolic Christian Churches (Nazarene)	Evangelical Protestant	European Free-Church	1	35	0.0
American Baptist Association, The	Evangelical Protestant	Baptist	1	25	0.0
North American Baptist Conference	Evangelical Protestant	Baptist	1	12	0.0
African Methodist Episcopal Church	Black Protestant	Methodist/Pietist	---	---	---
African Methodist Episcopal Zion Church	Black Protestant	Methodist/Pietist	---	---	---
Alliance of Baptists	Mainline Protestant	Baptist	---	---	---
Anglican Church in North America	Evangelical Protestant	Episcopalianism/Anglicanism	---	---	---
Association of Reformed Baptist Churches of America	Evangelical Protestant	Baptist	---	---	---
Bible Fellowship Church	Evangelical Protestant	Holiness	---	---	---
Buddhists	Other	Other Groups	12	---	---
Calvary Chapel Fellowship Churches	Evangelical Protestant	Pentecostal	3	---	---
Christian Brethren	Evangelical Protestant	Ind. Fundamentalist	---	---	---
Christian Methodist Episcopal Church	Black Protestant	Methodist/Pietist	---	---	---
Church of Christ, Scientist	Other	Christian Science	---	---	---
Church of God (Seventh Day)	Evangelical Protestant	Adventist	---	---	---
Church of God in Christ	Black Protestant	Pentecostal	---	---	---
Church of God in Christ, Mennonite	Evangelical Protestant	European Free-Church	---	---	---
Church of Our Lord Jesus Christ of the Apostolic Faith, Inc.	Black Protestant	Pentecostal	---	---	---
Church of the Lutheran Brethren of America	Evangelical Protestant	Lutheran	---	---	---
Conservative Judaism	Other	Judaism	---	---	---
Coptic Orthodox Church	Orthodox	Eastern Liturgical (Orthodox)	---	---	---
Elim Fellowship	Evangelical Protestant	Pentecostal	---	---	---
Evangelical Presbyterian Church	Evangelical Protestant	Presbyterian-Reformed	---	---	---
Friends General Conference and Friends United Meeting, dually aligned meetings*	Mainline Protestant	European Free-Church	---	---	---
Full Gospel Baptist Church Fellowship	Black Protestant	Baptist	---	---	---
Grace Brethren Churches, Fellowship of	Mainline Protestant	European Free-Church	---	---	---
Hindus	Other	Other Groups	5	---	---
Hutterian Brethren	Evangelical Protestant	Communal	---	---	---
Independent Fundamental Churches of America	Evangelical Protestant	Ind. Fundamentalist	---	---	---
International Fellowship of Christian Assemblies	Evangelical Protestant	----	---	---	---
International Pentecostal Holiness Church	Evangelical Protestant	Pentecostal	---	---	---
Jain	Other	Other Groups	4	---	---
Jehovah's Witnesses	Other	Adventist	---	---	---
Korean Presbyterian Church in America	Evangelical Protestant	Presbyterian-Reformed	---	---	---
Lutheran Congregations in Mission for Christ	Evangelical Protestant	Lutheran	---	---	---
National Baptist Convention of America, Inc.	Black Protestant	Baptist	---	---	---
National Baptist Convention, USA, Inc.	Black Protestant	Baptist	---	---	---
National Missionary Baptist Convention, Inc.	Black Protestant	Baptist	---	---	---
National Spiritualist Association of Churches	Other	Spiritualist	---	---	---
New Apostolic Church of North America, National Organization of the	Other	Other Groups	---	---	---
Non-denominational	Evangelical Protestant	----	---	---	---
Open Bible Standard Churches, Inc.	Evangelical Protestant	Pentecostal	---	---	---
Orthodox Judaism	Other	Judaism	---	---	---
Pentecostal Fire-Baptized Holiness Church	Evangelical Protestant	Pentecostal	---	---	---
Polish National Catholic Church	Catholic	Catholicism	---	---	---
Progressive National Baptist Convention, Inc.	Black Protestant	Baptist	---	---	---
Reconstructionist Judaism	Other	Judaism	---	---	---
Reform Judaism	Other	Judaism	---	---	---
Reformed Baptist Churches	Evangelical Protestant	Baptist	2	---	---
Russian Orthodox Church Outside of Russia	Orthodox	Eastern Liturgical (Orthodox)	4	---	---
Seventh Day Baptist General Conference, USA and Canada	Evangelical Protestant	Baptist	---	---	---
Sikh	Other	Other Groups	3	---	---
Southwide Baptist Fellowship	Evangelical Protestant	Baptist	2	---	---
Tao	Other	Other Groups	---	---	---
Unaffiliated Friends Meetings*	Mainline Protestant	European Free-Church	---	---	---
Union of Messianic Jewish Congregations	Other	Judaism	---	---	---
United Catholic Church, Inc.	Catholic	Catholicism	---	---	---
United Holy Church of America, Inc.	Black Protestant	Pentecostal	---	---	---
United Pentecostal Church International	Evangelical Protestant	Pentecostal	---	---	---
United Pentecostal Council of the Assemblies of God	Evangelical Protestant	Pentecostal	---	---	---
Unity Churches, Association of	Other	Other Groups	---	---	---
Zoroastrian	Other	Other Groups	---	---	---
		Totals:	1,955	1,971,102

The population of Connecticut was 3,405,565 in 2000; in 1990 it was 3,287,116. The total population changed 3.6%. The adherent totals of the religious groups listed above (1,971,102) included 57.9% of the total population in 2000.

^* 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 www.usreligioncensus.org for those who are interested in these trends.

Source

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.