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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 Adherence Rate
Catholic Church Catholic Catholicism 371 1,947,223 374.8
Non-denominational Evangelical Protestant
----
486 209,195 40.3
Muslim Estimate Other Other Groups 62 201,152 38.7
National Baptist Convention, USA, Inc. Black Protestant Baptist 99 68,865 13.3
Evangelical Lutheran Church in America Mainline Protestant Lutheran 145 49,925 9.6
Southern Baptist Convention Evangelical Protestant Baptist 181 49,909 9.6
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 120 45,979 8.9
United Church of Christ Mainline Protestant Presbyterian-Reformed 101 39,866 7.7
United Methodist Church, The Mainline Protestant Methodist/Pietist 121 33,584 6.5
Assemblies of God Evangelical Protestant Pentecostal 64 32,646 6.3
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 18 30,870 5.9
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 91 30,537 5.9
Reform Judaism Other Judaism 19 25,726 5.0
Church of God in Christ Black Protestant Pentecostal 94 20,760 4.0
American Baptist Churches in the USA Mainline Protestant Baptist 53 19,460 3.7
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 60 18,854 3.6
Seventh-day Adventist Church Evangelical Protestant Adventist 64 18,714 3.6
Buddhism, Mahayana Other Other Groups 34 17,013 3.3
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 25 16,508 3.2
Orthodox Judaism Other Judaism 57 16,250 3.1
Progressive National Baptist Convention, Inc. Black Protestant Baptist 41 15,143 2.9
Conservative Judaism Other Judaism 14 12,857 2.5
National Missionary Baptist Convention, Inc. Black Protestant Baptist 34 12,358 2.4
African Methodist Episcopal Church Black Protestant Methodist/Pietist 46 11,269 2.2
Christian Methodist Episcopal Church Black Protestant Methodist/Pietist 21 9,855 1.9
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 27 8,979 1.7
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 46 8,398 1.6
National Baptist Convention of America, Inc. Black Protestant Baptist 19 7,687 1.5
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 53 7,200 1.4
Churches of Christ Evangelical Protestant Baptist 47 6,825 1.3
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 32 6,198 1.2
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 41 5,749 1.1
Buddhism, Theravada Other Other Groups 13 5,640 1.1
Reformed Church in America Mainline Protestant Presbyterian-Reformed 14 5,555 1.1
Serbian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 6 5,533 1.1
Hindu, Indian-American Hindu Temple Assoc. Other Other Groups 8 5,234 1.0
Church of the Nazarene Evangelical Protestant Holiness 33 5,023 1.0
Antiochian Orthodox Christian Archdiocese of North America, The Orthodox Eastern Liturgical (Orthodox) 3 4,170 0.8
Salvation Army Evangelical Protestant Holiness 15 3,574 0.7
Mennonite Church USA Evangelical Protestant European Free-Church 17 3,255 0.6
Christian Churches and Churches of Christ Evangelical Protestant Baptist 16 3,217 0.6
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 11 3,186 0.6
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 11 2,958 0.6
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 19 2,877 0.6
Christian Church (Disciples of Christ) Mainline Protestant Baptist 15 2,840 0.5
Bahá'í Other Other Groups 17 2,781 0.5
Unitarian Universalist Association of Congregations Other Liberal 10 2,688 0.5
Christian and Missionary Alliance, The Evangelical Protestant Holiness 28 2,445 0.5
Reconstructionist Judaism Other Judaism 2 2,330 0.4
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 16 2,188 0.4
Vineyard USA Evangelical Protestant Pentecostal 8 2,037 0.4
Hindu, Traditional Temples Other Other Groups 1 1,900 0.4
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) 3 1,740 0.3
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 3 1,612 0.3
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 8 1,568 0.3
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) 1 1,500 0.3
International Churches of Christ Evangelical Protestant Baptist 1 1,298 0.2
Buddhism, Vajrayana Other Other Groups 11 1,048 0.2
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 6 876 0.2
Armenian Church of North America (Catholicosate of Etchmiadzin) Orthodox Eastern Liturgical (Orthodox) 3 850 0.2
North American Baptist Conference Evangelical Protestant Baptist 6 778 0.1
Romanian Orthodox Archdiocese in Americas Orthodox Eastern Liturgical (Orthodox) 2 740 0.1
Malankara Orthodox Syrian Church Orthodox Eastern Liturgical (Orthodox) 4 720 0.1
Free Methodist Church of North America Evangelical Protestant Holiness 3 682 0.1
Hindu, Renaissance Other Other Groups 5 661 0.1
Eritrean Orthodox Orthodox Eastern Liturgical (Orthodox) 2 610 0.1
Coptic Orthodox Church Orthodox Eastern Liturgical (Orthodox) 1 600 0.1
Hindu, Post Renaissance Other Other Groups 17 522 0.1
Malankara Archdiocese of the Syrian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 3 522 0.1
Russian Orthodox Church Outside of Russia Orthodox Eastern Liturgical (Orthodox) 1 500 0.1
Missionary Church, The Evangelical Protestant Holiness 8 454 0.1
American Carpatho-Russian Orthodox Diocese Orthodox Eastern Liturgical (Orthodox) 2 450 0.1
Bulgarian Eastern Orthodox Diocese of the USA, Canada and Australia Orthodox Eastern Liturgical (Orthodox) 1 425 0.1
Orthodox Presbyterian Church, The Evangelical Protestant Presbyterian-Reformed 5 405 0.1
Albanian Orthodox Diocese of America Orthodox Eastern Liturgical (Orthodox) 1 350 0.1
Wesleyan Church, The Evangelical Protestant Holiness 4 331 0.1
Protestant Reformed Churches in America Evangelical Protestant Presbyterian-Reformed 2 262 0.1
Friends General Conference* Mainline Protestant European Free-Church 3 257 0.0
Community of Christ Other Latter-day Saints 2 242 0.0
Macedonian Orthodox Church: American Diocese Orthodox Eastern Liturgical (Orthodox) 1 200 0.0
Church of God of Prophecy Evangelical Protestant Pentecostal 4 177 0.0
Church of the Brethren Evangelical Protestant European Free-Church 3 172 0.0
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 2 165 0.0
Friends General Conference and Friends United Meeting, dually aligned meetings* Mainline Protestant European Free-Church 1 161 0.0
Syriac Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) 1 160 0.0
Georgian Orthodox Parishes in the United States Orthodox Eastern Liturgical (Orthodox) 1 150 0.0
Apostolic Christian Church of America, Inc. Evangelical Protestant European Free-Church 1 145 0.0
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 2 131 0.0
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed 1 119 0.0
Pentecostal Church of God Evangelical Protestant Pentecostal 1 109 0.0
National Association of Free Will Baptists Evangelical Protestant Baptist 1 105 0.0
Zoroastrian Other Other Groups 1 84 0.0
Fellowship of Evangelical Churches Evangelical Protestant European Free-Church 1 72 0.0
Cumberland Presbyterian Church Evangelical Protestant Presbyterian-Reformed 2 60 0.0
Apostolic Faith Mission of Portland, OR Evangelical Protestant Pentecostal 1 43 0.0
Friends United Meeting* Mainline Protestant European Free-Church 1 34 0.0
International Pentecostal Holiness Church Evangelical Protestant Pentecostal 1 23 0.0
Evangelical Friends Church International* Evangelical Protestant European Free-Church 1 21 0.0
Evangelical Congregational Church, The Evangelical Protestant Methodist/Pietist 1 0 ---
Alliance of Baptists Mainline Protestant Baptist 2 --- ---
Anglican Church in North America Evangelical Protestant Episcopalianism/Anglicanism 8 --- ---
Brethren In Christ Church Evangelical Protestant European Free-Church 1 --- ---
Calvary Chapel Fellowship Churches Evangelical Protestant Pentecostal 3 --- ---
Christian Brethren Evangelical Protestant Ind. Fundamentalist 4 --- ---
Church of Christ (Holiness), U.S.A Evangelical Protestant Holiness 6 --- ---
Church of Christ, Scientist Other Christian Science 19 --- ---
Church of God (Seventh Day) Evangelical Protestant Adventist 4 --- ---
Church of Our Lord Jesus Christ of the Apostolic Faith, Inc. Black Protestant Pentecostal 3 --- ---
Communion of Reformed Evangelical Churches Evangelical Protestant Presbyterian-Reformed 1 --- ---
Conservative Baptist Association of America Evangelical Protestant Baptist 12 --- ---
Cumberland Presbyterian Church in America Black Protestant Presbyterian-Reformed 1 --- ---
Elim Fellowship Evangelical Protestant Pentecostal 1 --- ---
Ethiopian Orthodox Orthodox Eastern Liturgical (Orthodox) 1 --- ---
Full Gospel Baptist Church Fellowship Black Protestant Baptist 24 --- ---
Fundamental Baptist Fellowship Evangelical Protestant Baptist 1 --- ---
General Association of Regular Baptist Churches Evangelical Protestant Baptist 5 --- ---
Grace Gospel Fellowship Evangelical Protestant Ind. Fundamentalist 2 --- ---
Hungarian Reformed Churches (Additional) Mainline Protestant Presbyterian-Reformed 1 --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 18 --- ---
International Council of Community Churches Mainline Protestant Presbyterian-Reformed 12 --- ---
Jehovah's Witnesses Other Adventist 60 --- ---
Korean Presbyterian Church Abroad Evangelical Protestant Presbyterian-Reformed 5 --- ---
Korean Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 6 --- ---
Korean-American Presbyterian Church Evangelical Protestant Presbyterian-Reformed 3 --- ---
National Spiritualist Association of Churches Other Spiritualist 5 --- ---
New Apostolic Church of North America, National Organization of the Other Other Groups 8 --- ---
New Testament Association of Independent Baptist Churches Evangelical Protestant Baptist 2 --- ---
North American Lutheran Church Evangelical Protestant Lutheran 1 --- ---
Pentecostal Fire-Baptized Holiness Church Evangelical Protestant Pentecostal 3 --- ---
Polish National Catholic Church Catholic Catholicism 5 --- ---
Reformed Baptist Churches Evangelical Protestant Baptist 2 --- ---
Sikh Other Other Groups 3 --- ---
Swedenborgian Church Other Spiritualist 2 --- ---
Unaffiliated Friends Meetings* Mainline Protestant European Free-Church 2 --- ---
Union of Messianic Jewish Congregations Other Judaism 1 --- ---
United Holy Church of America, Inc. Black Protestant Pentecostal 2 --- ---
United Pentecostal Church International Evangelical Protestant Pentecostal 16 --- ---
United Pentecostal Council of the Assemblies of God Evangelical Protestant Pentecostal 4 --- ---
United Reformed Churches in North America Evangelical Protestant Presbyterian-Reformed 3 --- ---
Unity Churches, Association of Other Other Groups 7 --- ---
Totals: 3,354 3,097,119  

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.

* 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.