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	399	1,252,936	350.6
Non-denominational	Evangelical Protestant	----	276	72,863	20.4
United Church of Christ	Mainline Protestant	Presbyterian-Reformed	242	96,506	27.0
Episcopal Church	Mainline Protestant	Episcopalianism/Anglicanism	171	59,261	16.6
United Methodist Church, The	Mainline Protestant	Methodist/Pietist	124	47,627	13.3
American Baptist Churches in the USA	Mainline Protestant	Baptist	122	40,672	11.4
Assemblies of God	Evangelical Protestant	Pentecostal	89	17,947	5.0
Evangelical Lutheran Church in America	Mainline Protestant	Lutheran	73	24,736	6.9
Church of God (Cleveland, Tennessee)	Evangelical Protestant	Pentecostal	63	9,379	2.6
Jehovah's Witnesses	Other	Adventist	55	---	---
Seventh-day Adventist Church	Evangelical Protestant	Adventist	55	8,749	2.4
Southern Baptist Convention	Evangelical Protestant	Baptist	52	7,271	2.0
Lutheran Church--Missouri Synod	Evangelical Protestant	Lutheran	37	9,785	2.7
Muslim Estimate	Other	Other Groups	36	13,418	3.8
Orthodox Judaism	Other	Judaism	35	8,160	2.3
Church of Jesus Christ of Latter-day Saints, The	Other	Latter-day Saints	32	14,990	4.2
Church of God in Christ	Black Protestant	Pentecostal	27	3,870	1.1
Conservative Judaism	Other	Judaism	27	18,681	5.2
United Pentecostal Church International	Evangelical Protestant	Pentecostal	27	---	---
National Association of Congregational Christian Churches	Mainline Protestant	Presbyterian-Reformed	25	3,412	1.0
African Methodist Episcopal Zion Church	Black Protestant	Methodist/Pietist	24	5,845	1.6
Buddhism, Mahayana	Other	Other Groups	23	5,297	1.5
Churches of Christ	Evangelical Protestant	Baptist	23	2,618	0.7
Evangelical Free Church of America, The	Evangelical Protestant	Methodist/Pietist	23	3,666	1.0
Reform Judaism	Other	Judaism	22	20,366	5.7
Salvation Army	Evangelical Protestant	Holiness	22	3,840	1.1
Hindu, Post Renaissance	Other	Other Groups	21	686	0.2
Church of the Nazarene	Evangelical Protestant	Holiness	20	2,007	0.6
Christian and Missionary Alliance, The	Evangelical Protestant	Holiness	19	2,601	0.7
Presbyterian Church (U.S.A.)	Mainline Protestant	Presbyterian-Reformed	19	7,380	2.1
Unitarian Universalist Association of Congregations	Other	Liberal	19	3,928	1.1
Church of Christ, Scientist	Other	Christian Science	18	---	---
Orthodox Church in America	Orthodox	Eastern Liturgical (Orthodox)	18	3,086	0.9
Converge Worldwide/Baptist General Conference	Evangelical Protestant	Baptist	17	5,010	1.4
Greek Orthodox Archdiocese of America	Orthodox	Eastern Liturgical (Orthodox)	17	11,727	3.3
African Methodist Episcopal Church	Black Protestant	Methodist/Pietist	14	4,474	1.3
Conservative Baptist Association of America	Evangelical Protestant	Baptist	14	---	---
Evangelical Covenant Church, The	Evangelical Protestant	Methodist/Pietist	14	2,644	0.7
Church of Our Lord Jesus Christ of the Apostolic Faith, Inc.	Black Protestant	Pentecostal	12	---	---
Presbyterian Church in America	Evangelical Protestant	Presbyterian-Reformed	12	1,105	0.3
Polish National Catholic Church	Catholic	Catholicism	11	---	---
Buddhism, Vajrayana	Other	Other Groups	10	917	0.3
Friends General Conference and Friends United Meeting, dually aligned meetings*	Mainline Protestant	European Free-Church	10	628	0.2
Bahá'í	Other	Other Groups	8	1,014	0.3
Christian Church (Disciples of Christ)	Mainline Protestant	Baptist	8	168	0.0
Church of God of Prophecy	Evangelical Protestant	Pentecostal	8	1,149	0.3
Conservative Congregational Christian Conference	Evangelical Protestant	Presbyterian-Reformed	8	573	0.2
Anglican Church in North America	Evangelical Protestant	Episcopalianism/Anglicanism	7	---	---
Christian Methodist Episcopal Church	Black Protestant	Methodist/Pietist	7	2,180	0.6
Unity Churches, Association of	Other	Other Groups	7	---	---
Christian Churches and Churches of Christ	Evangelical Protestant	Baptist	6	699	0.2
Foursquare Gospel, International Church of the	Evangelical Protestant	Pentecostal	6	292	0.1
Free Methodist Church of North America	Evangelical Protestant	Holiness	6	974	0.3
Hindu, Indian-American Hindu Temple Assoc.	Other	Other Groups	6	3,890	1.1
National Spiritualist Association of Churches	Other	Spiritualist	6	---	---
United Holy Church of America, Inc.	Black Protestant	Pentecostal	6	---	---
Christian Brethren	Evangelical Protestant	Ind. Fundamentalist	5	---	---
National Baptist Convention, USA, Inc.	Black Protestant	Baptist	5	2,858	0.8
Pentecostal Fire-Baptized Holiness Church	Evangelical Protestant	Pentecostal	5	---	---
Ukrainian Orthodox Church of the USA	Orthodox	Eastern Liturgical (Orthodox)	5	525	0.1
American Carpatho-Russian Orthodox Diocese	Orthodox	Eastern Liturgical (Orthodox)	4	1,003	0.3
Buddhism, Theravada	Other	Other Groups	4	1,296	0.4
Congregational Christian Churches, Additional (not part of any national CCC body)	Mainline Protestant	Presbyterian-Reformed	4	657	0.2
Elim Fellowship	Evangelical Protestant	Pentecostal	4	---	---
Korean Presbyterian Church in America	Evangelical Protestant	Presbyterian-Reformed	4	---	---
National Missionary Baptist Convention, Inc.	Black Protestant	Baptist	4	727	0.2
New Apostolic Church of North America, National Organization of the	Other	Other Groups	4	---	---
Russian Orthodox Church Outside of Russia	Orthodox	Eastern Liturgical (Orthodox)	4	340	0.1
Wesleyan Church, The	Evangelical Protestant	Holiness	4	179	0.1
Armenian Church of North America (Catholicosate of Etchmiadzin)	Orthodox	Eastern Liturgical (Orthodox)	3	1,000	0.3
Community of Christ	Other	Latter-day Saints	3	365	0.1
Full Gospel Baptist Church Fellowship	Black Protestant	Baptist	3	---	---
General Association of Regular Baptist Churches	Evangelical Protestant	Baptist	3	---	---
International Churches of Christ	Evangelical Protestant	Baptist	3	621	0.2
International Council of Community Churches	Mainline Protestant	Presbyterian-Reformed	3	---	---
International Fellowship of Christian Assemblies	Evangelical Protestant	----	3	---	---
National Baptist Convention of America, Inc.	Black Protestant	Baptist	3	2,774	0.8
Pentecostal Church of God	Evangelical Protestant	Pentecostal	3	327	0.1
Seventh Day Baptist General Conference, USA and Canada	Evangelical Protestant	Baptist	3	58	0.0
Vineyard USA	Evangelical Protestant	Pentecostal	3	471	0.1
Antiochian Orthodox Christian Archdiocese of North America, The	Orthodox	Eastern Liturgical (Orthodox)	2	1,061	0.3
Calvary Chapel Fellowship Churches	Evangelical Protestant	Pentecostal	2	---	---
Church of God (Anderson, Indiana)	Evangelical Protestant	Holiness	2	100	0.0
Church of God (Seventh Day)	Evangelical Protestant	Adventist	2	---	---
Church of the Lutheran Brethren of America	Evangelical Protestant	Lutheran	2	599	0.2
Hindu, Traditional Temples	Other	Other Groups	2	1,883	0.5
Jain	Other	Other Groups	2	---	---
Lutheran Congregations in Mission for Christ	Evangelical Protestant	Lutheran	2	131	0.0
Metropolitan Community Churches, Universal Fellowship of	Mainline Protestant	Other Groups	2	127	0.0
Orthodox Presbyterian Church, The	Evangelical Protestant	Presbyterian-Reformed	2	132	0.0
Reformed Baptist Churches	Evangelical Protestant	Baptist	2	---	---
Sikh	Other	Other Groups	2	---	---
Tao	Other	Other Groups	2	---	---
Union of Messianic Jewish Congregations	Other	Judaism	2	---	---
United Catholic Church, Inc.	Catholic	Catholicism	2	1,404	0.4
Wisconsin Evangelical Lutheran Synod	Evangelical Protestant	Lutheran	2	243	0.1
Alliance of Baptists	Mainline Protestant	Baptist	1	---	---
Apostolic Christian Church of America, Inc.	Evangelical Protestant	European Free-Church	1	575	0.2
Armenian Apostolic Church of America (Catholicosate of Cilicia)	Orthodox	Eastern Liturgical (Orthodox)	1	500	0.1
Association of Reformed Baptist Churches of America	Evangelical Protestant	Baptist	1	---	---
Bible Fellowship Church	Evangelical Protestant	Holiness	1	43	0.0
Christian Reformed Church in North America	Evangelical Protestant	Presbyterian-Reformed	1	245	0.1
Church of God in Christ, Mennonite	Evangelical Protestant	European Free-Church	1	0	---
Coptic Orthodox Church	Orthodox	Eastern Liturgical (Orthodox)	1	390	0.1
Evangelical Presbyterian Church	Evangelical Protestant	Presbyterian-Reformed	1	184	0.1
Grace Brethren Churches, Fellowship of	Mainline Protestant	European Free-Church	1	---	---
International Pentecostal Church of Christ	Evangelical Protestant	Pentecostal	1	75	0.0
International Pentecostal Holiness Church	Evangelical Protestant	Pentecostal	1	152	0.0
North American Baptist Conference	Evangelical Protestant	Baptist	1	---	---
Open Bible Standard Churches, Inc.	Evangelical Protestant	Pentecostal	1	29	0.0
Progressive National Baptist Convention, Inc.	Black Protestant	Baptist	1	241	0.1
Reconstructionist Judaism	Other	Judaism	1	432	0.1
Unaffiliated Friends Meetings*	Mainline Protestant	European Free-Church	1	---	---
United Pentecostal Council of the Assemblies of God	Evangelical Protestant	Pentecostal	1	---	---
Zoroastrian	Other	Other Groups	0	88	0.0
		Totals:	2,597	1,830,862

The population of Connecticut was 3,574,097 in 2010; in 2000 it was 3,405,565. The total population changed 4.9%. The adherent totals of the religious groups listed above (1,830,862) included 51.2% of the total population in 2010.

^* 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.