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
Catholic Church Catholic 1,234 3,600,705 315.1
United Methodist Church, The Mainline Protestant 1,534 505,406 44.2
Evangelical Lutheran Church in America Mainline Protestant 573 319,552 28.0
Lutheran Church--Missouri Synod Evangelical Protestant 506 313,425 27.4
Southern Baptist Convention Evangelical Protestant 888 264,312 23.1
Presbyterian Church (U.S.A.) Mainline Protestant 497 194,039 17.0
United Church of Christ Mainline Protestant 423 191,500 16.8
Christian Churches and Churches of Christ Evangelical Protestant 467 110,663 9.7
American Baptist Churches in the USA Mainline Protestant 298 104,615 9.2
Episcopal Church Mainline Protestant 206 73,844 6.5
Christian Church (Disciples of Christ) Mainline Protestant 204 73,479 6.4
Assemblies of God Evangelical Protestant 292 62,662 5.5
Church of the Nazarene Evangelical Protestant 257 48,677 4.3
Jewish Estimate Other Theology 68 46,031 4.0
Churches of Christ Evangelical Protestant 305 31,594 2.8
Church of God (Anderson, Indiana) Evangelical Protestant 114 26,643 2.3
Church of Jesus Christ of Latter-day Saints, The Other Theology 62 23,610 2.1
Salvation Army, The Evangelical Protestant 52 22,313 2.0
Reformed Church in America Mainline Protestant 54 21,288 1.9
African Methodist Episcopal Zion Church Evangelical Protestant 14 18,426 1.6
Seventh-day Adventist Church Evangelical Protestant 100 17,576 1.5
Free Methodist Church of North America Evangelical Protestant 76 17,235 1.5
Christian Reformed Church in North America Evangelical Protestant 44 16,633 1.5
Baptist General Conference Evangelical Protestant 68 16,165 1.4
Evangelical Covenant Church, The Evangelical Protestant 62 15,082 1.3
Church of God (Cleveland, Tennessee) Evangelical Protestant 135 12,341 1.1
Evangelical Free Church of America, The Evangelical Protestant 68 11,650 1.0
Conservative Baptist Association of America Evangelical Protestant 37 9,989 0.9
Wisconsin Evangelical Lutheran Synod Evangelical Protestant 33 9,932 0.9
Unitarian Universalist Association of Congregations Other Theology 38 9,227 0.8
International Church of the Foursquare Gospel Evangelical Protestant 29 9,123 0.8
Church of the Brethren Evangelical Protestant 42 7,236 0.6
National Association of Congregational Christian Churches Mainline Protestant 29 4,914 0.4
Christian Brethren Evangelical Protestant 39 4,055 0.4
Open Bible Standard Churches, Inc. Evangelical Protestant 21 3,381 0.3
Christian and Missionary Alliance, The Evangelical Protestant 29 3,200 0.3
Cumberland Presbyterian Church Evangelical Protestant 42 2,869 0.3
North American Baptist Conference Evangelical Protestant 14 2,639 0.2
Friends (Quakers) Mainline Protestant 26 2,341 0.2
Missionary Church, The Evangelical Protestant 16 2,227 0.2
Old Order Amish Church Evangelical Protestant 12 1,889 0.2
Conservative Congregational Christian Conference Evangelical Protestant 6 1,374 0.1
Evangelical Congregational Church, The Evangelical Protestant 12 1,349 0.1
Latvian Evangelical Lutheran Church in America Mainline Protestant 3 1,219 0.1
Presbyterian Church in America Evangelical Protestant 12 1,304 0.1
Evangelical Mennonite Church Evangelical Protestant 6 1,120 0.1
Baptist Missionary Association of America Evangelical Protestant 11 875 0.1
American Baptist Association, The Evangelical Protestant 8 800 0.1
Syrian Orthodox Church of Antioch Orthodox 2 845 0.1
Brethren Church, The (Ashland, Ohio) Evangelical Protestant 3 808 0.1
Universal Fellowship of Metropolitan Community Churches Mainline Protestant 2 800 0.1
Church of God General Conference Evangelical Protestant 11 759 0.1
Estonian Evangelical Lutheran Church Mainline Protestant 3 742 0.1
Separate Baptists in Christ Evangelical Protestant 7 566 0.1
Evangelical Lutheran Synod Evangelical Protestant 3 534 0.1
Armenian Apostolic Church / Catholicossate of Cilicia Orthodox 3 577 0.1
Advent Christian Church Evangelical Protestant 7 617 0.1
Protestant Reformed Churches in America Evangelical Protestant 1 435 0.0
Moravian Church in America--Northern Province Mainline Protestant 1 468 0.0
Ukrainian Orthodox Church of the USA Orthodox 1 340 0.0
Apostolic Christian Churches (Nazarene) Evangelical Protestant 4 291 0.0
Orthodox Presbyterian Church, The Evangelical Protestant 3 368 0.0
Reformed Episcopal Church Evangelical Protestant 2 377 0.0
Beachy Amish Mennonite Churches Evangelical Protestant 1 182 0.0
Church of the Lutheran Brethren of America Evangelical Protestant 1 208 0.0
Primitive Methodist Church in the USA Evangelical Protestant 1 194 0.0
Evangelical Methodist Church Evangelical Protestant 2 122 0.0
Association of Free Lutheran Congregations, The Evangelical Protestant 1 152 0.0
Brethren In Christ Church Evangelical Protestant 1 73 0.0
International Pentecostal Holiness Church Evangelical Protestant 4 112 0.0
Church of God (Seventh Day) Evangelical Protestant 2 47 0.0
Seventh Day Baptist General Conference, USA and Canada Evangelical Protestant 1 45 0.0
Fire Baptized Holiness Church, (Wesleyan), The Evangelical Protestant 1 9 0.0
Mennonite Brethren Churches, U.S. Conference of Evangelical Protestant 1 49 0.0
Totals (Unadjusted)*: 9,135 6,250,249  

The population of these counties (or equivalent) in 1980 was 11,426,518. The adherent totals of the religious groups listed above (6,250,249) include 54.7% of the total population in 1980.

Source

The 1980 data were collected by the Glenmary Research Center and includes statistics for 111 Judeo-Christian church bodies, including number of churches and adherents. These data originally appeared in Churches and Church Membership in the United States, 1980, published by the Glenmary Research Center.

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.