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St. Clair County (Illinois)

Religious Traditions, 2010

46,903 10,290 24,655 46,372 2,100 5,880 133,856
Evangelical Protestant Black Protestant Mainline Protestant Catholic Orthodox Other Unclaimed

Congregational adherents include all full members, their children, and others who regularly attend services. The 2010 reports contain incomplete counts of congregations and adherents belonging to the eight largest historically African-American denominations. These denominations are not included in the 2000 reports and are largely missing from the 1990 and 1980 reports.
[More information on the data sources]


Religious Bodies Tradition Family Congregations Adherents Adherence Rate
African Methodist Episcopal Church Black Protestant Methodist/Pietist 7 955 3.54
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 2 198 0.73
American Baptist Churches in the USA Mainline Protestant Baptist 6 1,619 6.00
Anglican Church in North America Evangelical Protestant Episcopalianism/Anglicanism 1 --- ---
Armenian Church of North America (Catholicosate of Etchmiadzin) Orthodox Eastern Liturgical (Orthodox) 1 1,700 6.29
Assemblies of God Evangelical Protestant Pentecostal 12 1,258 4.66
Bahá'í Other Other Groups 0 152 0.56
Calvary Chapel Fellowship Churches Evangelical Protestant Pentecostal 1 --- ---
Catholic Church Catholic Catholicism 28 46,372 171.71
Christian Church (Disciples of Christ) Mainline Protestant Baptist 2 191 0.71
Christian Churches and Churches of Christ Evangelical Protestant Baptist 6 1,917 7.10
Christian Methodist Episcopal Church Black Protestant Methodist/Pietist 4 651 2.41
Church of Christ, Scientist Other Christian Science 1 --- ---
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 7 403 1.49
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 2 387 1.43
Church of God in Christ Black Protestant Pentecostal 12 2,411 8.93
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 6 2,129 7.88
Church of the Nazarene Evangelical Protestant Holiness 7 643 2.38
Churches of Christ Evangelical Protestant Baptist 6 1,183 4.38
Community of Christ Other Latter-day Saints 2 276 1.02
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 2 718 2.66
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 1 70 0.26
Evangelical Lutheran Church in America Mainline Protestant Lutheran 5 1,492 5.52
Full Gospel Baptist Church Fellowship Black Protestant Baptist 3 --- ---
General Association of Regular Baptist Churches Evangelical Protestant Baptist 1 --- ---
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 1 400 1.48
Hindu, Post Renaissance Other Other Groups 1 25 0.09
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 1 --- ---
Jehovah's Witnesses Other Adventist 4 --- ---
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 14 5,159 19.10
Muslim Estimate Other Other Groups 1 3,298 12.21
National Association of Free Will Baptists Evangelical Protestant Baptist 1 107 0.40
National Baptist Convention, USA, Inc. Black Protestant Baptist 5 4,928 18.25
National Missionary Baptist Convention, Inc. Black Protestant Baptist 7 1,147 4.25
New Apostolic Church of North America, National Organization of the Other Other Groups 1 --- ---
Non-denominational Evangelical Protestant
43 11,175 41.38
Pentecostal Church of God Evangelical Protestant Pentecostal 1 109 0.40
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 2 1,032 3.82
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 2 222 0.82
Salvation Army Evangelical Protestant Holiness 2 454 1.68
Seventh-day Adventist Church Evangelical Protestant Adventist 3 603 2.23
Southern Baptist Convention Evangelical Protestant Baptist 49 23,213 85.96
United Church of Christ Mainline Protestant Presbyterian-Reformed 22 8,988 33.28
United Holy Church of America, Inc. Black Protestant Pentecostal 1 --- ---
United Methodist Church, The Mainline Protestant Methodist/Pietist 14 10,615 39.31
United Pentecostal Church International Evangelical Protestant Pentecostal 9 --- ---
Totals: 309 136,200  

The population of St. Clair County, Illinois was 270,056 in 2010; in 2000 it was 256,082. The total population changed 5.5%. The adherent totals of the religious groups listed above (136,200) included 50.4% of the total population in 2010.

* In an effort to better match the ASARB standards for adherents, a few religious bodies changed the way their adherents were reported in 2010, including the Catholic Church, Amish groups, Friends groups, Jewish groups, the Church of Jesus Christ of Latter-day Saints, Non-denominational Christian Churches, and the United Methodist Church. This change does not affect any of the data in the newly released 2010 U.S. Religion Census: Religious Congregations & Membership Study. In fact, the data for these groups are now more comparable to that of other bodies than it was in previous decadal reports.

However, the change in methodology can distort assessments on growth or decline between 2000 and 2010 for each of these groups. County-level 2000 data using the new methodology are not readily available. ASARB staff has adjusted some 2000 county-level adherent statistics to allow for a more accurate picture on growth or decline. The revised maps and charts are now available on-line at for those who are interested in these trends.


2010 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include statistics for 236 religious groups, providing information on the number of their congregations and adherents within each state and county in the United States. Clifford Grammich, Kirk Hadaway, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley and Richard H. Taylor supervised the collection. These data originally appeared in 2010 U.S. Religion Census: Religious Congregations & Membership Study, published by the Association of Statisticians of American Religious Bodies (ASARB). [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 2010 the Episcopal Church had an adherence rate of 7.6 in Autauga County, Alabama. This means that about 8 out of every 1,000 people in Autauga County were Episcopalian.

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