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