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Peoria County (Illinois)

Religious Traditions, 2010

30,685 3,482 18,343 26,165 396 22,276 85,147
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
American Baptist Churches in the USA Mainline Protestant Baptist 3 1,484 8.12
Apostolic Christian Church of America, Inc. Evangelical Protestant European Free-Church 2 1,531 8.37
Apostolic Christian Churches (Nazarene) Evangelical Protestant European Free-Church 1 46 0.25
Assemblies of God Evangelical Protestant Pentecostal 7 1,203 6.58
Association of Free Lutheran Congregations Evangelical Protestant Lutheran 1 63 0.34
Baptist Missionary Association of America Evangelical Protestant Baptist 1 20 0.11
Black Baptists Estimate Evangelical Protestant Baptist --- 7,657 41.88
Catholic Church Catholic Catholicism 21 34,713 189.87
Christian Church (Disciples of Christ) Mainline Protestant Baptist 5 2,540 13.89
Christian Churches and Churches of Christ Evangelical Protestant Baptist 4 702 3.84
Church of Christ, Scientist Other Christian Science 2 --- ---
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 2 238 1.30
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 1 125 0.68
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 1 678 3.71
Church of the Brethren Evangelical Protestant European Free-Church 1 233 1.27
Church of the Nazarene Evangelical Protestant Holiness 6 591 3.23
Church of the United Brethren in Christ Evangelical Protestant Methodist/Pietist 1 60 0.33
Churches of Christ Evangelical Protestant Baptist 5 611 3.34
Conservative Baptist Association of America Evangelical Protestant Baptist 1 --- ---
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 4 346 1.89
Evangelical Lutheran Church in America Mainline Protestant Lutheran 11 6,740 36.87
Fellowship of Evangelical Churches Evangelical Protestant European Free-Church 1 0 0.00
Free Methodist Church of North America Evangelical Protestant Holiness 2 186 1.02
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 1 --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 2 --- ---
Independent, Charismatic Churches Evangelical Protestant Pentecostal 1 500 2.73
Independent, Non-Charismatic Churches Evangelical Protestant
1 300 1.64
Jewish Other Judaism 2 567 3.10
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 9 5,835 31.92
Mennonite Church USA Evangelical Protestant European Free-Church 8 879 4.81
Missionary Church, The Evangelical Protestant Holiness 3 687 3.76
National Association of Free Will Baptists Evangelical Protestant Baptist 1 21 0.11
North American Baptist Conference Evangelical Protestant Baptist 1 75 0.41
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 10 4,738 25.92
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 3 2,691 14.72
Reformed Church in America Mainline Protestant Presbyterian-Reformed 1 83 0.45
Salvation Army Evangelical Protestant Holiness 1 208 1.14
Seventh-day Adventist Church Evangelical Protestant Adventist 2 472 2.58
Southern Baptist Convention Evangelical Protestant Baptist 8 3,949 21.60
Unitarian Universalist Association of Congregations Other Liberal 1 237 1.30
United Church of Christ Mainline Protestant Presbyterian-Reformed 6 2,249 12.30
United Methodist Church, The Mainline Protestant Methodist/Pietist 26 12,749 69.73
Totals: 170 96,007  

The population of Peoria County, Illinois was 182,827 in 1990; in 1980 it was 200,466. The total population changed -8.8%. The adherent totals of the religious groups listed above (96,007) included 52.5% of the total population in 1990.

* 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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