State Membership Report
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Illinois

Denominational Groups, 2000

1,279,050 1,177,187 92,297 3,874,933 443,633 5,552,193
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
Advent Christian Church Evangelical Protestant 9 1,019 0.1
African Methodist Episcopal Zion Church Evangelical Protestant 14 18,426 1.6
Albanian Orthodox Diocese of America Orthodox 1 n.a. n.a.
Allegheny Wesleyan Methodist Connection Evangelical Protestant 1 19 0.0
American Association of Lutheran Churches Evangelical Protestant 5 1,433 0.1
American Baptist Churches in the USA Mainline Protestant 296 96,440 8.4
American Carpatho-Russian Orthodox Greek Catholic Church Orthodox 2 355 0.0
Apostolic Catholic Assyrian Church of the East, North American Dioceses Orthodox 3 27,182 2.4
Apostolic Christian Church of America, Inc. Evangelical Protestant 18 8,428 0.7
Apostolic Christian Churches (Nazarene) Evangelical Protestant 4 293 0.0
Armenian Apostolic Church / Catholicossate of Cilicia Orthodox 3 4,050 0.4
Assemblies of God Evangelical Protestant 339 80,656 7.1
Association of Free Lutheran Congregations, The Evangelical Protestant 10 2,579 0.2
Baptist General Conference Evangelical Protestant 79 16,649 1.5
Baptist Missionary Association of America Evangelical Protestant 12 2,226 0.2
Beachy Amish Mennonite Churches Evangelical Protestant 2 215 0.0
Black Baptists Estimate Evangelical Protestant n.a. 397,339 34.8
Brethren Church, The (Ashland, Ohio) Evangelical Protestant 4 671 0.1
Brethren In Christ Church Evangelical Protestant 2 71 0.0
Byelorussion Council Of Orthodox Churches In North America Orthodox 1 n.a. n.a.
Catholic Church Catholic 1,089 3,611,033 315.9
Christ Catholic Church Evangelical Protestant 2 17 0.0
Christian and Missionary Alliance, The Evangelical Protestant 60 6,147 0.5
Christian Brethren Evangelical Protestant 45 5,452 0.5
Christian Church (Disciples of Christ) Mainline Protestant 202 65,546 5.7
Christian Churches and Churches of Christ Evangelical Protestant 498 119,161 10.4
Christian Reformed Church in North America Evangelical Protestant 51 17,390 1.5
Church of Christ, Scientist Other Theology 104 n.a. n.a.
Church of God (Anderson, Indiana) Evangelical Protestant 115 9,932 0.9
Church of God (Cleveland, Tennessee) Evangelical Protestant 124 15,169 1.3
Church of God (Seventh Day) Evangelical Protestant 4 325 0.0
Church of God General Conference Evangelical Protestant 12 837 0.1
Church of God of Prophecy Evangelical Protestant 28 1,355 0.1
Church of Jesus Christ of Latter-day Saints, The Other Theology 85 30,352 2.7
Church of the Brethren Evangelical Protestant 44 6,719 0.6
Church of the Lutheran Brethren of America Evangelical Protestant 1 97 0.0
Church of the Lutheran Confession Evangelical Protestant 1 65 0.0
Church of the Nazarene Evangelical Protestant 268 42,056 3.7
Church of the United Brethren in Christ Evangelical Protestant 9 293 0.0
Churches of Christ Evangelical Protestant 298 33,334 2.9
Churches of God, General Conference Evangelical Protestant 29 4,380 0.4
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant 3 1,395 0.1
Conservative Baptist Association of America Evangelical Protestant 35 n.a. n.a.
Conservative Congregational Christian Conference Evangelical Protestant 7 2,017 0.2
Cumberland Presbyterian Church Evangelical Protestant 43 3,195 0.3
Eastern Pennsylvania Mennonite Church Evangelical Protestant 3 135 0.0
Episcopal Church Mainline Protestant 184 54,751 4.8
Estonian Evangelical Lutheran Church Mainline Protestant 2 397 0.0
Evangelical Congregational Church, The Evangelical Protestant 10 1,085 0.1
Evangelical Free Church of America, The Evangelical Protestant 89 19,601 1.7
Evangelical Lutheran Church in America Mainline Protestant 568 296,968 26.0
Evangelical Lutheran Synod Evangelical Protestant 3 402 0.0
Evangelical Mennonite Church Evangelical Protestant 8 1,343 0.1
Evangelical Methodist Church Evangelical Protestant 3 171 0.0
Evangelical Presbyterian Church Evangelical Protestant 3 377 0.0
Fire Baptized Holiness Church, (Wesleyan), The Evangelical Protestant 1 21 0.0
Free Methodist Church of North America Evangelical Protestant 78 5,576 0.5
Friends (Quakers) Mainline Protestant 27 2,012 0.2
Greek Orthodox Archdiocese of America Orthodox 33 n.a. n.a.
Independent Fundamental Churches of America Evangelical Protestant 68 n.a. n.a.
Independent, Charismatic Churches Evangelical Protestant 22 14,930 1.3
Independent, Non-Charismatic Churches Evangelical Protestant 40 48,055 4.2
International Church of the Foursquare Gospel Evangelical Protestant 41 11,315 1.0
International Pentecostal Holiness Church Evangelical Protestant 6 367 0.0
Jewish Estimate Other Theology 184 269,188 23.6
Latvian Evangelical Lutheran Church in America Mainline Protestant 4 1,320 0.1
Lutheran Church--Missouri Synod Evangelical Protestant 519 295,820 25.9
Mennonite Brethren Churches, U.S. Conference of Evangelical Protestant 1 25 0.0
Mennonite Church USA Evangelical Protestant 75 9,628 0.8
Missionary Church, The Evangelical Protestant 17 2,490 0.2
Moravian Church in America--Northern Province Mainline Protestant 1 447 0.0
National Association of Congregational Christian Churches Mainline Protestant 33 5,175 0.5
National Association of Free Will Baptists Evangelical Protestant 41 5,309 0.5
Netherlands Reformed Congregations Evangelical Protestant 1 16 0.0
North American Baptist Conference Evangelical Protestant 14 2,370 0.2
Old Order Amish Church Evangelical Protestant 19 2,800 0.2
Old Regular Baptists Evangelical Protestant 2 69 0.0
Open Bible Standard Churches, Inc. Evangelical Protestant 18 n.a. n.a.
Orthodox Church in America: Romanian Orthodox Episcopate of America Orthodox 2 n.a. n.a.
Orthodox Church in America: Territorial Dioceses Orthodox 13 n.a. n.a.
Pentecostal Church of God Evangelical Protestant 20 1,561 0.1
Presbyterian Church (U.S.A.) Mainline Protestant 474 158,320 13.9
Presbyterian Church in America Evangelical Protestant 27 5,493 0.5
Primitive Baptists Associations Evangelical Protestant 12 323 0.0
Primitive Methodist Church in the USA Evangelical Protestant 1 142 0.0
Reformed Church in America Mainline Protestant 56 20,196 1.8
Reformed Episcopal Church Evangelical Protestant 2 281 0.0
Salvation Army, The Evangelical Protestant 57 7,209 0.6
Seventh Day Baptist General Conference, USA and Canada Evangelical Protestant 1 67 0.0
Seventh-day Adventist Church Evangelical Protestant 129 24,442 2.1
Southern Baptist Convention Evangelical Protestant 917 292,644 25.6
Syrian Orthodox Church of Antioch Orthodox 3 1,900 0.2
Ukrainian Orthodox Church of the USA Orthodox 2 n.a. n.a.
Unitarian Universalist Association of Congregations Other Theology 40 8,194 0.7
United Baptists Evangelical Protestant 1 37 0.0
United Church of Christ Mainline Protestant 411 185,558 16.2
United Methodist Church, The Mainline Protestant 1,480 440,681 38.6
Wesleyan Church, The Evangelical Protestant 35 4,204 0.4
Wisconsin Evangelical Lutheran Synod Evangelical Protestant 36 10,689 0.9
Totals (Unadjusted)*: 9,799 6,848,422  
The population of these counties (or equivalents) in 1990 was 11,430,602. The adherent totals of the religious groups listed above (6,848,422) include 59.9% 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.