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DuPage County, Illinois

Religious Traditions, 2010

120,953 3,014 71,909 8,460 373,823 77,889 260,876
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
Advent Christian Church Evangelical Protestant Adventist --- --- ---
American Baptist Association, The Evangelical Protestant Baptist 1 150 0.2
American Baptist Churches in the USA Mainline Protestant Baptist 3 742 1.1
Assemblies of God Evangelical Protestant Pentecostal 10 3,349 5.1
Baptist Missionary Association of America Evangelical Protestant Baptist 1 9 0.0
Catholic Church Catholic Catholicism 40 241,030 365.8
Christian and Missionary Alliance, The Evangelical Protestant Holiness 7 1,101 1.7
Christian Brethren Evangelical Protestant Ind. Fundamentalist 3 700 1.1
Christian Church (Disciples of Christ) Mainline Protestant Restoration Movement 2 407 0.6
Christian Churches and Churches of Christ Evangelical Protestant Restoration Movement 5 1,065 1.6
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 5 2,324 3.5
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 1 315 0.5
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 1 24 0.0
Church of God General Conference Evangelical Protestant Adventist --- --- ---
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 3 1,688 2.6
Church of the Brethren Evangelical Protestant European Free-Church 2 510 0.8
Church of the Lutheran Confession Evangelical Protestant Lutheran --- --- ---
Church of the Nazarene Evangelical Protestant Holiness 2 416 0.6
Churches of Christ Evangelical Protestant Restoration Movement 6 788 1.2
Conservative Baptist Association of America Evangelical Protestant Baptist 4 1,090 1.7
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 6 929 1.4
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 12 8,532 13.0
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 5 1,579 2.4
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 7 1,132 1.7
Evangelical Lutheran Church in America Mainline Protestant Lutheran 29 20,391 31.0
Evangelical Lutheran Synod Evangelical Protestant Lutheran 1 383 0.6
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 1 164 0.2
Free Methodist Church of North America Evangelical Protestant Holiness 1 90 0.1
Friends (Quakers) Mainline Protestant European Free-Church 1 76 0.1
Jewish Other Judaism 1 575 0.9
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran 1 238 0.4
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 24 26,374 40.0
Mennonite Church Evangelical Protestant European Free-Church 1 185 0.3
Missionary Church, The Evangelical Protestant Holiness 2 63 0.1
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 4 583 0.9
North American Baptist Conference Evangelical Protestant Baptist 3 687 1.0
Orthodox Presbyterian Church, The Evangelical Protestant Presbyterian-Reformed 1 268 0.4
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 15 12,712 19.3
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 1 124 0.2
Reformed Church in America Mainline Protestant Presbyterian-Reformed 3 643 1.0
Salvation Army Evangelical Protestant Holiness 1 273 0.4
Seventh-day Adventist Church Evangelical Protestant Adventist 6 2,607 4.0
Southern Baptist Convention Evangelical Protestant Baptist 10 3,293 5.0
Unitarian Universalist Association of Congregations Other Liberal 2 550 0.8
United Church of Christ Mainline Protestant Presbyterian-Reformed 23 14,914 22.6
United Methodist Church, The Mainline Protestant Methodist/Pietist 28 23,053 35.0
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 2 272 0.4
Totals: 287 376,398  

The population of DuPage County, Illinois was 658,835 in 1980. The adherent totals of the religious groups listed above (376,398) included 57.1% of the total population in 1980.

* 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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