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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 370 2,146,961 399.3
Evangelical Lutheran Church in America Mainline Protestant Lutheran 160 63,421 11.8
Southern Baptist Convention Evangelical Protestant Baptist 150 63,084 11.7
United Methodist Church, The Mainline Protestant Methodist/Pietist 144 42,712 7.9
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 135 63,814 11.9
Jewish Other Judaism 117 234,400 43.6
United Church of Christ Mainline Protestant Presbyterian-Reformed 110 52,747 9.8
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 101 36,966 6.9
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 74 22,255 4.1
Assemblies of God Evangelical Protestant Pentecostal 66 14,013 2.6
Seventh-day Adventist Church Evangelical Protestant Adventist 58 15,521 2.9
American Baptist Churches in the USA Mainline Protestant Baptist 57 21,825 4.1
Churches of Christ Evangelical Protestant Restoration Movement 51 7,614 1.4
Buddhists Other Other Groups 47 --- ---
Muslim Estimate Other Other Groups 46 95,623 17.8
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 43 9,353 1.7
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 40 8,678 1.6
Church of the Nazarene Evangelical Protestant Holiness 38 3,861 0.7
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 38 9,841 1.8
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 34 4,995 0.9
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 28 12,251 2.3
Christian and Missionary Alliance, The Evangelical Protestant Holiness 22 2,884 0.5
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 22 8,862 1.6
Reformed Church in America Mainline Protestant Presbyterian-Reformed 22 8,818 1.6
Christian Churches and Churches of Christ Evangelical Protestant Restoration Movement 21 5,272 1.0
Bahá'í Other Other Groups 20 2,505 0.5
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 19 3,408 0.6
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 19 29,049 5.4
Salvation Army Evangelical Protestant Holiness 19 6,128 1.1
Independent, Non-Charismatic Churches Evangelical Protestant
----
17 8,027 1.5
Mennonite Church USA Evangelical Protestant European Free-Church 17 2,974 0.6
Conservative Baptist Association of America Evangelical Protestant Baptist 16 3,220 0.6
International Council of Community Churches Mainline Protestant Presbyterian-Reformed 16 8,196 1.5
Christian Church (Disciples of Christ) Mainline Protestant Restoration Movement 15 3,146 0.6
Hindus Other Other Groups 13 --- ---
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 13 1,403 0.3
Unitarian Universalist Association of Congregations Other Liberal 12 2,671 0.5
New Testament Association of Independent Baptist Churches and other Fundamental Bapti Evangelical Protestant Baptist 9 2,543 0.5
Friends (Quakers) Mainline Protestant European Free-Church 7 602 0.1
Independent, Charismatic Churches Evangelical Protestant Pentecostal 7 4,775 0.9
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 6 1,044 0.2
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 6 2,244 0.4
Vineyard USA Evangelical Protestant Pentecostal 6 1,434 0.3
Church of the Brethren Evangelical Protestant European Free-Church 5 637 0.1
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 5 1,419 0.3
National Primitive Baptist Convention, USA Evangelical Protestant Baptist 5 669 0.1
North American Baptist Conference Evangelical Protestant Baptist 5 873 0.2
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 5 1,826 0.3
Church of God of Prophecy Evangelical Protestant Pentecostal 4 212 0.0
Free Methodist Church of North America Evangelical Protestant Holiness 4 226 0.0
General Association of Regular Baptist Churches Evangelical Protestant Baptist 4 849 0.2
Serbian Orthodox Church in the USA (New Gracanica Metropolitanate) Orthodox Eastern Liturgical (Orthodox) 4 --- ---
Wesleyan Church, The Evangelical Protestant Holiness 4 948 0.2
Apostolic Catholic Assyrian Church of the East, North American Dioceses Orthodox Eastern Liturgical (Orthodox) 3 19,650 3.7
Armenian Church of North America (Catholicosate of Etchmiadzin) Orthodox Eastern Liturgical (Orthodox) 3 3,688 0.7
Calvary Chapel Fellowship Churches Evangelical Protestant Pentecostal 3 --- ---
Community of Christ Other Latter-day Saints 3 329 0.1
Malankara Orthodox Syrian Church Orthodox Eastern Liturgical (Orthodox) 3 1,000 0.2
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 3 174 0.0
Orthodox Presbyterian Church, The Evangelical Protestant Presbyterian-Reformed 3 374 0.1
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) 3 1,356 0.3
United Reformed Churches in North America Evangelical Protestant Presbyterian-Reformed 3 775 0.1
Antiochian Orthodox Christian Archdiocese of North America, The Orthodox Eastern Liturgical (Orthodox) 2 1,428 0.3
Baptist Missionary Association of America Evangelical Protestant Baptist 2 84 0.0
Cumberland Presbyterian Church Evangelical Protestant Presbyterian-Reformed 2 53 0.0
Fellowship of Evangelical Churches Evangelical Protestant European Free-Church 2 52 0.0
International Pentecostal Holiness Church Evangelical Protestant Pentecostal 2 86 0.0
Malankara Archdiocese of the Syrian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 2 300 0.1
National Association of Free Will Baptists Evangelical Protestant Baptist 2 216 0.0
Orthodox Church in America: Romanian Orthodox Episcopate of America Orthodox Eastern Liturgical (Orthodox) 2 3,000 0.6
Primitive Baptist Church, The Evangelical Protestant Baptist 2 --- ---
Protestant Reformed Churches in America Evangelical Protestant Presbyterian-Reformed 2 564 0.1
Serbian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 2 7,500 1.4
Sikh Other Other Groups 2 --- ---
Albanian Orthodox Diocese of America Orthodox Eastern Liturgical (Orthodox) 1 270 0.1
American Baptist Association, The Evangelical Protestant Baptist 1 63 0.0
American Carpatho-Russian Orthodox Diocese Orthodox Eastern Liturgical (Orthodox) 1 207 0.0
Apostolic Christian Church of America, Inc. Evangelical Protestant European Free-Church 1 175 0.0
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) 1 980 0.2
Association of Free Lutheran Congregations Evangelical Protestant Lutheran 1 55 0.0
Bulgarian Eastern Orthodox Diocese of the USA, Canada and Australia Orthodox Eastern Liturgical (Orthodox) 1 900 0.2
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed 1 236 0.0
International Churches of Christ Evangelical Protestant Baptist 1 4,582 0.9
Jain Other Other Groups 1 --- ---
Macedonian Orthodox Church: American Diocese Orthodox Eastern Liturgical (Orthodox) 1 800 0.1
Missionary Church, The Evangelical Protestant Holiness 1 297 0.1
Netherlands Reformed Congregations Evangelical Protestant Presbyterian-Reformed 1 31 0.0
Orthodox Church in America: Bulgarian Diocese Orthodox Eastern Liturgical (Orthodox) 1 1,830 0.3
Pentecostal Church of God Evangelical Protestant Pentecostal 1 80 0.0
Romanian Orthodox Archdiocese in Americas Orthodox Eastern Liturgical (Orthodox) 1 525 0.1
Russian Orthodox Church Outside of Russia Orthodox Eastern Liturgical (Orthodox) 1 --- ---
Southwide Baptist Fellowship Evangelical Protestant Baptist 1 --- ---
U.S. Mennonite Brethren Evangelical Protestant European Free-Church 1 14 0.0
African Methodist Episcopal Church Black Protestant Methodist/Pietist --- --- ---
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist --- --- ---
Alliance of Baptists Mainline Protestant Baptist --- --- ---
American Association of Lutheran Churches Evangelical Protestant Lutheran --- --- ---
Anglican Church in North America Evangelical Protestant Episcopalianism/Anglicanism --- --- ---
Apostolic Faith Mission of Portland, OR Evangelical Protestant Pentecostal --- --- ---
Brethren In Christ Church Evangelical Protestant European Free-Church --- --- ---
Christian Brethren Evangelical Protestant Ind. Fundamentalist --- --- ---
Christian Methodist Episcopal Church Black Protestant Methodist/Pietist --- --- ---
Church of Christ (Holiness), U.S.A. Evangelical Protestant Holiness --- --- ---
Church of Christ, Scientist Other Christian Science --- --- ---
Church of God (Seventh Day) Evangelical Protestant Adventist --- --- ---
Church of God in Christ Black Protestant Pentecostal --- --- ---
Church of Our Lord Jesus Christ of the Apostolic Faith, Inc. Black Protestant Pentecostal --- --- ---
Church of the Lutheran Confession Evangelical Protestant Lutheran --- --- ---
Communion of Reformed Evangelical Churches Evangelical Protestant Presbyterian-Reformed --- --- ---
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed --- --- ---
Conservative Judaism Other Judaism --- --- ---
Coptic Orthodox Church Orthodox Eastern Liturgical (Orthodox) --- --- ---
Cumberland Presbyterian Church in America Black Protestant Presbyterian-Reformed --- --- ---
Elim Fellowship Evangelical Protestant Pentecostal --- --- ---
Eritrean Orthodox Orthodox Eastern Liturgical (Orthodox) --- --- ---
Ethiopian Orthodox Orthodox Eastern Liturgical (Orthodox) --- --- ---
Evangelical Congregational Church, The Evangelical Protestant Methodist/Pietist --- --- ---
Evangelical Friends Church International* Evangelical Protestant European Free-Church --- --- ---
Evangelical Lutheran Synod Evangelical Protestant Lutheran --- --- ---
Friends General Conference and Friends United Meeting, dually aligned meetings* Mainline Protestant European Free-Church --- --- ---
Friends General Conference* Mainline Protestant European Free-Church --- --- ---
Friends United Meeting* Mainline Protestant European Free-Church --- --- ---
Full Gospel Baptist Church Fellowship Black Protestant Baptist --- --- ---
Fundamental Baptist Fellowship Evangelical Protestant Baptist --- --- ---
Georgian Orthodox Parishes in the United States Orthodox Eastern Liturgical (Orthodox) --- --- ---
Grace Gospel Fellowship Evangelical Protestant Ind. Fundamentalist --- --- ---
Hungarian Reformed Churches (Additional) Mainline Protestant Presbyterian-Reformed --- --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist --- --- ---
Jehovah's Witnesses Other Adventist --- --- ---
Korean Presbyterian Church Abroad Evangelical Protestant Presbyterian-Reformed --- --- ---
Korean Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed --- --- ---
Korean-American Presbyterian Church Evangelical Protestant Presbyterian-Reformed --- --- ---
National Baptist Convention of America, Inc. Black Protestant Baptist --- --- ---
National Baptist Convention, USA, Inc. Black Protestant Baptist --- --- ---
National Missionary Baptist Convention, Inc. Black Protestant Baptist --- --- ---
National Spiritualist Association of Churches Other Spiritualist --- --- ---
New Apostolic Church of North America, National Organization of the Other Other Groups --- --- ---
New Testament Association of Independent Baptist Churches Evangelical Protestant Baptist --- --- ---
Non-denominational Evangelical Protestant
----
--- --- ---
North American Lutheran Church Evangelical Protestant Lutheran --- --- ---
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal --- --- ---
Orthodox Judaism Other Judaism --- --- ---
Pentecostal Fire-Baptized Holiness Church Evangelical Protestant Pentecostal --- --- ---
Polish National Catholic Church Catholic Catholicism --- --- ---
Progressive National Baptist Convention, Inc. Black Protestant Baptist --- --- ---
Reconstructionist Judaism Other Judaism --- --- ---
Reform Judaism Other Judaism --- --- ---
Reformed Baptist Churches Evangelical Protestant Baptist --- --- ---
Reformed Presbyterian Church of North America Evangelical Protestant Presbyterian-Reformed --- --- ---
Swedenborgian Church Other Spiritualist --- --- ---
Syriac Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) --- --- ---
Unaffiliated Friends Meetings* Mainline Protestant European Free-Church --- --- ---
Union of Messianic Jewish Congregations Other Judaism --- --- ---
United Holy Church of America, Inc. Black Protestant Pentecostal --- --- ---
United Pentecostal Church International Evangelical Protestant Pentecostal --- --- ---
United Pentecostal Council of the Assemblies of God Evangelical Protestant Pentecostal --- --- ---
Unity Churches, Association of Other Other Groups --- --- ---
Zoroastrian Other Other Groups --- --- ---
Totals: 2,346 3,098,473  

The population of Cook County, Illinois was 5,376,741 in 2000; in 1990 it was 5,105,067. The total population changed 5.3%. The adherent totals of the religious groups listed above (3,098,473) included 57.6% of the total population in 2000.

* 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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