Cook County, Illinois

Denominational Groups, 2000

270,818	261,906	74,202	2,146,961	344,061	2,278,793
Evangelical Protestant	Mainline Protestant	Orthodox	Catholic	Other	Unclaimed

Congregational "adherents" include all full members, their children, and others who regularly attend services. The historically African American denominations are not included in the 2000 congregation and membership totals. Many are also missing in 1990 and most historically African American denominations are missing in the 1980 reports.
[More information on the data sources]

Reports

Religious Bodies	Theology	Congregations	Adherents	Adherence Rate^†
Catholic Church	Catholic	370	2,146,961	399.3
Evangelical Lutheran Church in America	Mainline Protestant	160	63,421	11.8
Southern Baptist Convention	Evangelical Protestant	150	63,084	11.7
United Methodist Church, The	Mainline Protestant	144	42,712	7.9
Lutheran Church--Missouri Synod	Evangelical Protestant	135	63,814	11.9
Jewish Estimate	Other Theology	117	234,400	43.6
United Church of Christ	Mainline Protestant	110	52,747	9.8
Presbyterian Church (U.S.A.)	Mainline Protestant	101	36,966	6.9
Episcopal Church	Mainline Protestant	74	22,255	4.1
Assemblies of God	Evangelical Protestant	66	14,013	2.6
Seventh-day Adventist Church	Evangelical Protestant	58	15,521	2.9
American Baptist Churches in the USA	Mainline Protestant	57	21,825	4.1
Churches of Christ	Evangelical Protestant	51	7,614	1.4
Buddhism	Other Theology	47	n.a.	n.a.
Muslim Estimate	Other Theology	46	95,623	17.8
Baptist General Conference	Evangelical Protestant	43	9,353	1.7
Evangelical Free Church of America, The	Evangelical Protestant	40	8,678	1.6
Evangelical Covenant Church, The	Evangelical Protestant	38	9,841	1.8
Church of the Nazarene	Evangelical Protestant	38	3,861	0.7
Church of God (Cleveland, Tennessee)	Evangelical Protestant	34	4,995	0.9
Christian Reformed Church in North America	Evangelical Protestant	28	12,251	2.3
Reformed Church in America	Mainline Protestant	22	8,818	1.6
Church of Jesus Christ of Latter-day Saints, The	Other Theology	22	8,862	1.7
Christian and Missionary Alliance, The	Evangelical Protestant	22	2,884	0.5
Christian Churches and Churches of Christ	Evangelical Protestant	21	5,272	1.0
Bahá'í	Other Theology	20	2,505	0.5
Greek Orthodox Archdiocese of America	Orthodox	19	29,049	5.4
Church of God (Anderson, Indiana)	Evangelical Protestant	19	3,408	0.6
Salvation Army, The	Evangelical Protestant	19	6,128	1.1
Independent, Non-Charismatic Churches	Evangelical Protestant	17	8,027	1.5
Mennonite Church USA	Evangelical Protestant	17	2,974	0.6
Conservative Baptist Association of America	Evangelical Protestant	16	3,220	0.6
International Council of Community Churches	Mainline Protestant	16	8,196	1.5
Christian Church (Disciples of Christ)	Mainline Protestant	15	3,146	0.6
Hindu	Other Theology	13	n.a.	n.a.
Presbyterian Church in America	Evangelical Protestant	13	1,403	0.3
Unitarian Universalist Association of Congregations	Other Theology	12	2,671	0.5
New Testament Association of Independent Baptist Churches and other Fundamental Baptist Associations/Fellowships	Evangelical Protestant	9	2,543	0.5
Friends (Quakers)	Mainline Protestant	7	602	0.1
Independent, Charismatic Churches	Evangelical Protestant	7	4,775	0.9
Vineyard USA	Evangelical Protestant	6	1,434	0.3
Orthodox Church in America: Territorial Dioceses	Orthodox	6	2,244	0.4
National Association of Congregational Christian Churches	Mainline Protestant	6	1,044	0.2
Church of the Brethren	Evangelical Protestant	5	637	0.1
International Church of the Foursquare Gospel	Evangelical Protestant	5	1,419	0.3
North American Baptist Conference	Evangelical Protestant	5	873	0.2
National Primitive Baptist Convention, USA	Evangelical Protestant	5	669	0.1
Wisconsin Evangelical Lutheran Synod	Evangelical Protestant	5	1,826	0.3
Church of God of Prophecy	Evangelical Protestant	4	212	0.0
Wesleyan Church, The	Evangelical Protestant	4	948	0.2
General Association of Regular Baptist Churches	Evangelical Protestant	4	849	0.2
Serbian Orthodox Church in the USA (New Gracanica Metropolitanate)	Orthodox	4	n.a.	n.a.
Free Methodist Church of North America	Evangelical Protestant	4	226	0.0
Orthodox Presbyterian Church, The	Evangelical Protestant	3	374	0.1
Calvary Chapel Fellowship Churches	Evangelical Protestant	3	n.a.	n.a.
Community of Christ	Evangelical Protestant	3	329	0.1
United Reformed Churches in North America	Evangelical Protestant	3	775	0.1
Universal Fellowship of Metropolitan Community Churches	Mainline Protestant	3	174	0.0
Armenian Apostolic Church / Catholicossate of Etchmiadzin	Orthodox	3	3,688	0.7
Malankara Orthodox Syrian Church, American Diocese of the	Orthodox	3	1,000	0.2
Apostolic Catholic Assyrian Church of the East, North American Dioceses	Orthodox	3	19,650	3.7
Ukrainian Orthodox Church of the USA	Orthodox	3	1,356	0.3
Sikh	Other Theology	2	n.a.	n.a.
Baptist Missionary Association of America	Evangelical Protestant	2	84	0.0
Serbian Orthodox Church in the USA	Orthodox	2	7,500	1.4
Antiochian Orthodox Christian Archdiocese of North America, The	Orthodox	2	1,428	0.3
Primitive Baptist Churches--Old Line	Evangelical Protestant	2	n.a.	n.a.
National Association of Free Will Baptists	Evangelical Protestant	2	216	0.0
Malankara Archdiocese of the Syrian Orthodox Church in North America	Orthodox	2	300	0.1
Protestant Reformed Churches in America	Evangelical Protestant	2	564	0.1
International Pentecostal Holiness Church	Evangelical Protestant	2	86	0.0
Evangelical Mennonite Church	Evangelical Protestant	2	52	0.0
Orthodox Church in America: Romanian Orthodox Episcopate of America	Orthodox	2	3,000	0.6
Cumberland Presbyterian Church	Evangelical Protestant	2	53	0.0
Bulgarian Orthodox Diocese of the USA	Orthodox	1	900	0.2
Jain	Other Theology	1	n.a.	n.a.
Association of Free Lutheran Congregations, The	Evangelical Protestant	1	55	0.0
Macedonian Orthodox Church: American Diocese	Orthodox	1	800	0.2
Apostolic Christian Church of America, Inc.	Evangelical Protestant	1	175	0.0
International Churches of Christ	Evangelical Protestant	1	4,582	0.9
Mennonite Brethren Churches, U.S. Conference of	Evangelical Protestant	1	14	0.0
Netherlands Reformed Congregations	Evangelical Protestant	1	31	0.0
American Carpatho-Russian Orthodox Greek Catholic Church	Orthodox	1	207	0.0
Missionary Church, The	Evangelical Protestant	1	297	0.1
American Baptist Association, The	Evangelical Protestant	1	63	0.0
Albanian Orthodox Diocese of America	Orthodox	1	270	0.1
Armenian Apostolic Church / Catholicossate of Cilicia	Orthodox	1	980	0.2
Russian Orthodox Church Outside of Russia	Orthodox	1	n.a.	n.a.
Conservative Congregational Christian Conference	Evangelical Protestant	1	236	0.0
Southwide Baptist Fellowship	Evangelical Protestant	1	n.a.	n.a.
Pentecostal Church of God	Evangelical Protestant	1	80	0.0
Orthodox Church in America: Bulgarian Diocese	Orthodox	1	1,830	0.3
	*Totals (Unadjusted)^:**	2,345	3,097,948
	Total (Adjusted)^:**		4,251,783

The population of this county (or equivalent) in 1990 was 5,105,067; in 2000 it was 5,376,741. The total population changed 5.3%. The unadjusted adherent totals of the religious groups listed above (3,097,948) include 57.6% of the total population in 2000. The adjusted total adherents (4,251,783) include 79.1% of the population.

Source

^*The “Unadjusted Totals” come from the 1990 and 2000 data collected by representatives of the Association of Statisticians of American Religious Bodies (ASARB). While quite comprehensive, this data excludes most of the historically African-American denominations and some other major groups. As a result, these numbers will be an underestimate of the total adherence rate, particularly in areas with a large African-American population. The 2000 data included 149 religious groups and the final results are published in Religious Congregations and Membership in the United States 2000. Copyright © 2002, All rights reserved. The 1990 data included 132 groups and the final results are published in Churches and Church Membership in the United States 1990 Copyright © 1990, All rights reserved. Published by Glenmary Research Center, 1312 Fifth Ave., North, Nashville, TN 37208. www.glenmary.org/grc [More information on the data collection]

^**The “Adjusted Totals” include all adherents in the denominations counted by the Association of Statisticians of American Religious Bodies (ASARB) and estimates adherent totals for the historically African-American denominations and other religious groups not listed in the ASARB totals. An article by Roger Finke and Christopher P. Scheitle (2005) reviews how these estimates were computed.

^†The adherence rate provides the number of adherents of a particular group per 1,000 population. For example, in 2000 the Episcopal Church had an adherence rate of approximately 8 (8.1) in Autauga County, Alabama. This means that 8 out of every 1,000 people in Autauga county are Episcopalian.

[More information on the data source]