County Membership Report
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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 308 2,121,152 415.5
Black Baptists Estimate Evangelical Protestant n.a. 290,094 56.8
Jewish Estimate Other Theology 140 208,577 40.9
Lutheran Church--Missouri Synod Evangelical Protestant 144 83,205 16.3
Evangelical Lutheran Church in America Mainline Protestant 181 80,710 15.8
United Methodist Church, The Mainline Protestant 159 57,560 11.3
United Church of Christ Mainline Protestant 116 55,001 10.8
Presbyterian Church (U.S.A.) Mainline Protestant 103 40,909 8.0
Southern Baptist Convention Evangelical Protestant 101 32,192 6.3
Independent, Non-Charismatic Churches Evangelical Protestant 18 28,650 5.6
Apostolic Catholic Assyrian Church of the East, North American Dioceses Orthodox 2 25,937 5.1
Episcopal Church Mainline Protestant 79 23,311 4.6
American Baptist Churches in the USA Mainline Protestant 56 21,210 4.2
African Methodist Episcopal Zion Church Evangelical Protestant 8 16,090 3.2
Assemblies of God Evangelical Protestant 71 15,886 3.1
Seventh-day Adventist Church Evangelical Protestant 56 15,007 2.9
Christian Reformed Church in North America Evangelical Protestant 35 12,298 2.4
Churches of Christ Evangelical Protestant 51 11,189 2.2
Reformed Church in America Mainline Protestant 24 10,692 2.1
Independent, Charismatic Churches Evangelical Protestant 9 9,450 1.9
Baptist General Conference Evangelical Protestant 41 8,936 1.8
Church of Jesus Christ of Latter-day Saints, The Other Theology 17 6,988 1.4
Evangelical Free Church of America, The Evangelical Protestant 28 5,039 1.0
Christian Church (Disciples of Christ) Mainline Protestant 20 4,954 1.0
Christian Churches and Churches of Christ Evangelical Protestant 24 4,186 0.8
Church of the Nazarene Evangelical Protestant 39 3,881 0.8
Church of God (Cleveland, Tennessee) Evangelical Protestant 32 3,755 0.7
Unitarian Universalist Association of Congregations Other Theology 14 3,090 0.6
Armenian Apostolic Church / Catholicossate of Cilicia Orthodox 1 3,000 0.6
Christian and Missionary Alliance, The Evangelical Protestant 23 2,734 0.5
Church of God (Anderson, Indiana) Evangelical Protestant 17 2,616 0.5
Wisconsin Evangelical Lutheran Synod Evangelical Protestant 7 2,335 0.5
Christian Brethren Evangelical Protestant 22 2,225 0.4
Salvation Army, The Evangelical Protestant 18 2,071 0.4
Syrian Orthodox Church of Antioch Orthodox 3 1,900 0.4
National Association of Congregational Christian Churches Mainline Protestant 7 1,832 0.4
Mennonite Church USA Evangelical Protestant 22 1,628 0.3
Wesleyan Church, The Evangelical Protestant 7 1,165 0.2
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant 1 1,119 0.2
North American Baptist Conference Evangelical Protestant 7 1,104 0.2
International Church of the Foursquare Gospel Evangelical Protestant 3 839 0.2
Latvian Evangelical Lutheran Church in America Mainline Protestant 2 764 0.2
Friends (Quakers) Mainline Protestant 7 574 0.1
Church of the Brethren Evangelical Protestant 5 545 0.1
Free Methodist Church of North America Evangelical Protestant 7 358 0.1
Missionary Church, The Evangelical Protestant 3 327 0.1
Advent Christian Church Evangelical Protestant 2 302 0.1
Church of God of Prophecy Evangelical Protestant 6 291 0.1
Reformed Episcopal Church Evangelical Protestant 1 276 0.1
Church of God (Seventh Day) Evangelical Protestant 3 245 0.1
American Carpatho-Russian Orthodox Greek Catholic Church Orthodox 1 242 0.1
Apostolic Christian Church of America, Inc. Evangelical Protestant 1 217 0.0
Estonian Evangelical Lutheran Church Mainline Protestant 1 175 0.0
American Association of Lutheran Churches Evangelical Protestant 1 163 0.0
Evangelical Lutheran Synod Evangelical Protestant 2 144 0.0
National Association of Free Will Baptists Evangelical Protestant 2 101 0.0
Evangelical Congregational Church, The Evangelical Protestant 1 94 0.0
Evangelical Mennonite Church Evangelical Protestant 1 92 0.0
Cumberland Presbyterian Church Evangelical Protestant 2 82 0.0
Presbyterian Church in America Evangelical Protestant 2 80 0.0
International Pentecostal Holiness Church Evangelical Protestant 2 56 0.0
Baptist Missionary Association of America Evangelical Protestant 1 46 0.0
Mennonite Brethren Churches, U.S. Conference of Evangelical Protestant 1 25 0.0
Netherlands Reformed Congregations Evangelical Protestant 1 16 0.0
Old Regular Baptists Evangelical Protestant 1 7 0.0
Brethren In Christ Church Evangelical Protestant 1 0 0.0
Albanian Orthodox Diocese of America Orthodox 1 n.a. n.a.
Byelorussion Council Of Orthodox Churches In North America Orthodox 1 n.a. n.a.
Independent Fundamental Churches of America Evangelical Protestant 24 n.a. n.a.
Church of Christ, Scientist Other Theology 38 n.a. n.a.
Orthodox Church in America: Territorial Dioceses Orthodox 7 n.a. n.a.
Greek Orthodox Archdiocese of America Orthodox 18 n.a. n.a.
Open Bible Standard Churches, Inc. Evangelical Protestant 1 n.a. n.a.
Conservative Baptist Association of America Evangelical Protestant 18 n.a. n.a.
Orthodox Church in America: Romanian Orthodox Episcopate of America Orthodox 2 n.a. n.a.
Totals (Unadjusted)*: 2,181 3,229,739  

The population of this county (or equivalent) in 1990 was 5,105,067. The adherent totals of the religious groups listed above (3,229,739) include 63.3% of the total population in 1990.

Source

The 1990 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include statistics for 132 religious groups, including number of churches and adherents. Martin B. Bradley, Norman M. Green, Jr., Dale E. Jones, Mac Lynn, and Lou McNeil supervised the collection. These data originally appeared in Churches and Church Membership in the United States, 1990, published by the Glenmary Research Center.

[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 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.