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Cook County, Illinois

Religious Traditions, 2010

432,975 148,895 202,114 53,276 1,947,223 312,636 2,097,556
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]

Reports


Religious Bodies Tradition Family Congregations Adherents % Change
Southern Baptist Convention Evangelical Protestant Baptist +80 +17,717 +55.0%
Assemblies of God Evangelical Protestant Pentecostal -7 +16,760 +105.5%
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints +8 +9,520 +136.2%
Seventh-day Adventist Church Evangelical Protestant Adventist +8 +3,707 +24.7%
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed +14 +2,108 +2,635.0%
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal +9 +1,994 +53.1%
Mennonite Church USA Evangelical Protestant European Free-Church -5 +1,627 +99.9%
Salvation Army Evangelical Protestant Holiness -3 +1,503 +72.6%
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist +4 +1,159 +23.0%
Church of the Nazarene Evangelical Protestant Holiness -6 +1,142 +29.4%
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal +0 +773 +92.1%
Free Methodist Church of North America Evangelical Protestant Holiness -4 +324 +90.5%
Church of God (Anderson, Indiana) Evangelical Protestant Holiness +2 +261 +10.0%
American Carpatho-Russian Orthodox Diocese Orthodox Eastern Liturgical (Orthodox) +1 +208 +86.0%
Missionary Church, The Evangelical Protestant Holiness +5 +127 +38.8%
National Association of Free Will Baptists Evangelical Protestant Baptist -1 +4 +4.0%
Fellowship of Evangelical Churches Evangelical Protestant European Free-Church +0 -20 -21.7%
Cumberland Presbyterian Church Evangelical Protestant Presbyterian-Reformed +0 -22 -26.8%
International Pentecostal Holiness Church Evangelical Protestant Pentecostal -1 -33 -58.9%
Apostolic Christian Church of America, Inc. Evangelical Protestant European Free-Church +0 -72 -33.2%
Evangelical Congregational Church, The Evangelical Protestant Methodist/Pietist +0 -94 -100.0%
Church of God of Prophecy Evangelical Protestant Pentecostal -2 -114 -39.2%
Christian and Missionary Alliance, The Evangelical Protestant Holiness +5 -289 -10.6%
North American Baptist Conference Evangelical Protestant Baptist -1 -326 -29.5%
Church of the Brethren Evangelical Protestant European Free-Church -2 -373 -68.4%
Unitarian Universalist Association of Congregations Other Liberal -4 -402 -13.0%
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran +1 -767 -32.8%
Wesleyan Church, The Evangelical Protestant Holiness -3 -834 -71.6%
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed -1 -956 -52.2%
Christian Churches and Churches of Christ Evangelical Protestant Restoration Movement -8 -969 -23.1%
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) +0 -1,500 -50.0%
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist +12 -1,736 -19.4%
Syriac Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) -2 -1,740 -91.6%
American Baptist Churches in the USA Mainline Protestant Baptist -3 -1,750 -8.3%
Christian Church (Disciples of Christ) Mainline Protestant Restoration Movement -5 -2,114 -42.7%
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed -8 -3,319 -27.0%
Churches of Christ Evangelical Protestant Restoration Movement -4 -4,364 -39.0%
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism -19 -4,457 -19.1%
Reformed Church in America Mainline Protestant Presbyterian-Reformed -10 -5,137 -48.0%
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed -12 -10,372 -25.4%
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist +3 -13,132 -81.6%
United Church of Christ Mainline Protestant Presbyterian-Reformed -15 -15,135 -27.5%
United Methodist Church, The Mainline Protestant Methodist/Pietist -38 -23,976 -41.7%
Evangelical Lutheran Church in America Mainline Protestant Lutheran -36 -30,785 -38.1%
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran -24 -37,226 -44.7%
Catholic Church Catholic Catholicism +63 -173,929 -8.2%
Albanian Orthodox Diocese of America Orthodox Eastern Liturgical (Orthodox) +0 --- ---
Brethren In Christ Church Evangelical Protestant European Free-Church +0 --- ---
Christian Brethren Evangelical Protestant Ind. Fundamentalist -18 --- ---
Church of Christ, Scientist Other Christian Science -19 --- ---
Church of God (Seventh Day) Evangelical Protestant Adventist +1 --- ---
Conservative Baptist Association of America Evangelical Protestant Baptist -6 --- ---
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed --- --- ---
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) +0 --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist -6 --- ---
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal +1 --- ---
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) +4 --- ---
Pentecostal Church of God Evangelical Protestant Pentecostal --- --- ---
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) --- --- ---
Totals: -52 -277,009 -10%

The population of Cook County, Illinois was 5,194,675 in 2010; in 2000 it was 5,376,741. The total population changed -3.4%. The adherent totals of the religious groups listed above (3,097,119) included 59.6% of the total population in 2010.

The population of Cook County, Illinois was 5,105,067 in 1990; in 1980 it was 5,253,655. The total population changed -2.8%. The adherent totals of the religious groups listed above (3,229,739) included 63.3% 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 www.usreligioncensus.org for those who are interested in these trends.

Source

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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