County Membership Report
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Williamson County, Illinois

Denominational Groups, 2000

20,533 6,500   4,676 213 29,374
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]


Religious Bodies Theology Congregations Adherents Adherence Rate
American Baptist Churches in the USA Mainline Protestant 9 1,537 25.1
Assemblies of God Evangelical Protestant 3 285 4.7
Bahá'í Other Theology 0 13 0.2
Catholic Church Catholic 5 4,676 76.3
Christian Church (Disciples of Christ) Mainline Protestant 1 256 4.2
Christian Churches and Churches of Christ Evangelical Protestant 8 1,797 29.3
Church of God (Anderson, Indiana) Evangelical Protestant 2 302 4.9
Church of God (Cleveland, Tennessee) Evangelical Protestant 3 1,152 18.8
Church of God of Prophecy Evangelical Protestant 2 102 1.7
Church of the Nazarene Evangelical Protestant 2 136 2.2
Churches of Christ Evangelical Protestant 2 258 4.2
Community of Christ Evangelical Protestant 1 133 2.2
Episcopal Church Mainline Protestant 1 36 0.6
Evangelical Lutheran Church in America Mainline Protestant 1 330 5.4
Free Methodist Church of North America Evangelical Protestant 2 54 0.9
General Association of Regular Baptist Churches Evangelical Protestant 1 43 0.7
Jewish Estimate Other Theology 1 200 3.3
Lutheran Church--Missouri Synod Evangelical Protestant 2 397 6.5
National Association of Free Will Baptists Evangelical Protestant 4 417 6.8
Pentecostal Church of God Evangelical Protestant 1 240 3.9
Presbyterian Church (U.S.A.) Mainline Protestant 4 418 6.8
Salvation Army, The Evangelical Protestant 1 63 1.0
Seventh-day Adventist Church Evangelical Protestant 2 206 3.4
Southern Baptist Convention Evangelical Protestant 31 14,948 243.9
United Church of Christ Mainline Protestant 1 675 11.0
United Methodist Church, The Mainline Protestant 16 3,248 53.0
Totals (Unadjusted)*: 106 31,922  
Total (Adjusted)**:   35,731  

The population of this county (or equivalent) in 1990 was 57,733; in 2000 it was 61,296. The total population changed 6.2%. The unadjusted adherent totals of the religious groups listed above (31,922) include 52.1% of the total population in 2000. The adjusted total adherents (35,731) include 58.3% of the population.


*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. [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]

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