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DeKalb County, Illinois

Religious Traditions, 2010

9,843 182 14,719 400 19,447 4,267 56,302
Evangelical Protestant Black Protestant Mainline Protestant Orthodox Catholic 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
Catholic Church Catholic Catholicism 6 19,447 184.9
United Methodist Church, The Mainline Protestant Methodist/Pietist 13 5,851 55.6
Evangelical Lutheran Church in America Mainline Protestant Lutheran 6 4,737 45.0
Muslim Estimate Other Other Groups 1 3,298 31.4
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 4 2,755 26.2
United Church of Christ Mainline Protestant Presbyterian-Reformed 9 1,972 18.8
Non-denominational Evangelical Protestant
12 1,908 18.1
Assemblies of God Evangelical Protestant Pentecostal 4 1,414 13.4
American Baptist Churches in the USA Mainline Protestant Baptist 3 1,145 10.9
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 4 757 7.2
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 2 702 6.7
Southern Baptist Convention Evangelical Protestant Baptist 3 700 6.7
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 3 693 6.6
Salvation Army Evangelical Protestant Holiness 1 448 4.3
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 1 400 3.8
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 1 365 3.5
International Churches of Christ Evangelical Protestant Baptist 0 321 3.1
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 2 257 2.4
Lutheran Congregations in Mission for Christ Evangelical Protestant Lutheran 1 246 2.3
Churches of Christ Evangelical Protestant Restoration Movement 3 188 1.8
Wesleyan Church, The Evangelical Protestant Holiness 2 183 1.7
National Missionary Baptist Convention, Inc. Black Protestant Baptist 1 182 1.7
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 1 169 1.6
Church of the Nazarene Evangelical Protestant Holiness 2 159 1.5
Community of Christ Other Latter-day Saints 1 121 1.2
Unitarian Universalist Association of Congregations Other Liberal 2 116 1.1
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 1 113 1.1
Christian Churches and Churches of Christ Evangelical Protestant Restoration Movement 1 73 0.7
Vineyard USA Evangelical Protestant Pentecostal 1 61 0.6
Bahá'í Other Other Groups 0 39 0.4
Seventh-day Adventist Church Evangelical Protestant Adventist 1 38 0.4
Association of Free Lutheran Congregations Evangelical Protestant Lutheran 1 --- ---
Church of Christ, Scientist Other Christian Science 2 --- ---
Conservative Baptist Association of America Evangelical Protestant Baptist 2 --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 1 --- ---
Jehovah's Witnesses Other Adventist 3 --- ---
Korean Presbyterian Church Abroad Evangelical Protestant Presbyterian-Reformed 1 --- ---
North American Lutheran Church Evangelical Protestant Lutheran 1 --- ---
United Pentecostal Church International Evangelical Protestant Pentecostal 3 --- ---
Totals: 106 48,858  

The population of DeKalb County, Illinois was 105,160 in 2010; in 2000 it was 88,969. The total population changed 18.2%. The adherent totals of the religious groups listed above (48,858) included 46.5% 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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