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 % Change
Southern Baptist Convention Evangelical Protestant +49 +30,892 96.0%
Jewish Estimate Other Theology -23 +25,823 12.4%
Catholic Church Catholic +62 +25,809 1.2%
Salvation Army, The Evangelical Protestant +1 +4,057 195.9%
Evangelical Free Church of America, The Evangelical Protestant +12 +3,639 72.2%
Church of Jesus Christ of Latter-day Saints, The Other Theology +5 +1,874 26.8%
Mennonite Church USA Evangelical Protestant -5 +1,346 82.7%
Presbyterian Church in America Evangelical Protestant +11 +1,323 1653.8%
Church of God (Cleveland, Tennessee) Evangelical Protestant +2 +1,240 33.0%
Christian Churches and Churches of Christ Evangelical Protestant -3 +1,086 25.9%
Church of God (Anderson, Indiana) Evangelical Protestant +2 +792 30.3%
American Baptist Churches in the USA Mainline Protestant +1 +615 2.9%
International Church of the Foursquare Gospel Evangelical Protestant +2 +580 69.1%
Seventh-day Adventist Church Evangelical Protestant +2 +514 3.4%
Baptist General Conference Evangelical Protestant +2 +417 4.7%
Christian and Missionary Alliance, The Evangelical Protestant -1 +150 5.5%
National Association of Free Will Baptists Evangelical Protestant 0 +115 113.9%
Church of the Brethren Evangelical Protestant 0 +92 16.9%
Baptist Missionary Association of America Evangelical Protestant +1 +38 82.6%
International Pentecostal Holiness Church Evangelical Protestant 0 +30 53.6%
Friends (Quakers) Mainline Protestant 0 +28 4.9%
Netherlands Reformed Congregations Evangelical Protestant 0 +15 93.8%
Mennonite Brethren Churches, U.S. Conference of Evangelical Protestant 0 -11 -44.0%
Church of the Nazarene Evangelical Protestant -1 -20 -0.5%
Cumberland Presbyterian Church Evangelical Protestant 0 -29 -35.4%
Missionary Church, The Evangelical Protestant -2 -30 -9.2%
American Carpatho-Russian Orthodox Greek Catholic Church Orthodox 0 -35 -14.5%
Evangelical Mennonite Church Evangelical Protestant +1 -40 -43.5%
Apostolic Christian Church of America, Inc. Evangelical Protestant 0 -42 -19.4%
Christian Reformed Church in North America Evangelical Protestant -7 -47 -0.4%
Church of God of Prophecy Evangelical Protestant -2 -79 -27.1%
Free Methodist Church of North America Evangelical Protestant -3 -132 -36.9%
Wesleyan Church, The Evangelical Protestant -3 -217 -18.6%
North American Baptist Conference Evangelical Protestant -2 -231 -20.9%
Unitarian Universalist Association of Congregations Other Theology -2 -419 -13.6%
Wisconsin Evangelical Lutheran Synod Evangelical Protestant -2 -509 -21.8%
National Association of Congregational Christian Churches Mainline Protestant -1 -788 -43.0%
Episcopal Church Mainline Protestant -5 -1,056 -4.5%
Christian Church (Disciples of Christ) Mainline Protestant -5 -1,808 -36.5%
Assemblies of God Evangelical Protestant -5 -1,873 -11.8%
Reformed Church in America Mainline Protestant -2 -1,874 -17.5%
Armenian Apostolic Church / Catholicossate of Cilicia Orthodox 0 -2,020 -67.3%
United Church of Christ Mainline Protestant -6 -2,254 -4.1%
Churches of Christ Evangelical Protestant 0 -3,575 -32.0%
Presbyterian Church (U.S.A.) Mainline Protestant -2 -3,943 -9.6%
Independent, Charismatic Churches Evangelical Protestant -2 -4,675 -49.5%
Apostolic Catholic Assyrian Church of the East, North American Dioceses Orthodox +1 -6,287 -24.2%
United Methodist Church, The Mainline Protestant -15 -14,848 -25.8%
Evangelical Lutheran Church in America Mainline Protestant -21 -17,289 -21.4%
Lutheran Church--Missouri Synod Evangelical Protestant -9 -19,391 -23.3%
Independent, Non-Charismatic Churches Evangelical Protestant -1 -20,623 -72.0%
Albanian Orthodox Diocese of America Orthodox 0 n.a. n.a.
Conservative Baptist Association of America Evangelical Protestant -2 n.a. n.a.
Greek Orthodox Archdiocese of America Orthodox +1 n.a. n.a.
Orthodox Church in America: Romanian Orthodox Episcopate of America Orthodox 0 n.a. n.a.
Orthodox Church in America: Territorial Dioceses Orthodox -1 n.a. n.a.
  Totals: +22 -3,670 -.1%

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 adherent totals for 1990 (3,229,739) represent 63.3% of the 1990 population. The adherent totals for 2000 (3,097,948) include 57.6% of the 2000 population. The totals represent the change in groups that reported in both 1990 and 2000 only. There is sufficient data for 51 groups to calculate 1990-2000 change. These 51 groups had 2,916,141 adherents in 1990 and 2,912,471 adherents in 2000, for a change of -.1%

Sources

The 2000 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and includes statistics for 149 religious groups, including number of churches and adherents. Dale E. Jones, Sherri Doty, Clifford Grammich, James E. Horsch, Richard Houseal, Mac Lynn, John P. Marcum, Kenneth M. Sanchagrin and Richard H. Taylor supervised the collection. These data originally appeared in Religious Congregations & Membership in the United States, 2000, published by the Glenmary Research Center.

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 these data sources]