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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
Advent Christian Church Evangelical Protestant Adventist 2 302 0.1
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 8 16,090 3.2
Albanian Orthodox Diocese of America Orthodox Eastern Liturgical (Orthodox) 1 --- ---
American Association of Lutheran Churches Evangelical Protestant Lutheran 1 163 0.0
American Baptist Churches in the USA Mainline Protestant Baptist 56 21,210 4.2
American Carpatho-Russian Orthodox Diocese Orthodox Eastern Liturgical (Orthodox) 1 242 0.0
Apostolic Catholic Assyrian Church of the East, North American Dioceses Orthodox Eastern Liturgical (Orthodox) 2 25,937 5.1
Apostolic Christian Church of America, Inc. Evangelical Protestant European Free-Church 1 217 0.0
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) 1 3,000 0.6
Assemblies of God Evangelical Protestant Pentecostal 71 15,886 3.1
Association of Free Lutheran Congregations Evangelical Protestant Lutheran --- --- ---
Baptist Missionary Association of America Evangelical Protestant Baptist 1 46 0.0
Black Baptists Estimate Evangelical Protestant Baptist --- 290,094 56.8
Brethren In Christ Church Evangelical Protestant European Free-Church 1 0 ---
Byelorussion Council Of Orthodox Churches In North America Orthodox Eastern Liturgical (Orthodox) 1 --- ---
Catholic Church Catholic Catholicism 308 2,121,152 415.5
Christian and Missionary Alliance, The Evangelical Protestant Holiness 23 2,734 0.5
Christian Brethren Evangelical Protestant Ind. Fundamentalist 22 2,225 0.4
Christian Church (Disciples of Christ) Mainline Protestant Baptist 20 4,954 1.0
Christian Churches and Churches of Christ Evangelical Protestant Baptist 24 4,186 0.8
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 35 12,298 2.4
Church of Christ, Scientist Other Christian Science 38 --- ---
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 17 2,616 0.5
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 32 3,755 0.7
Church of God (Seventh Day) Evangelical Protestant Adventist 3 245 0.0
Church of God of Prophecy Evangelical Protestant Pentecostal 6 291 0.1
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 17 6,988 1.4
Church of the Brethren Evangelical Protestant European Free-Church 5 545 0.1
Church of the Nazarene Evangelical Protestant Holiness 39 3,881 0.8
Churches of Christ Evangelical Protestant Baptist 51 11,189 2.2
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed 1 1,119 0.2
Conservative Baptist Association of America Evangelical Protestant Baptist 18 --- ---
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed --- --- ---
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 41 8,936 1.8
Cumberland Presbyterian Church Evangelical Protestant Presbyterian-Reformed 2 82 0.0
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 79 23,311 4.6
Estonian Evangelical Lutheran Church Mainline Protestant Lutheran 1 175 0.0
Evangelical Congregational Church, The Evangelical Protestant Methodist/Pietist 1 94 0.0
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 28 5,039 1.0
Evangelical Lutheran Church in America Mainline Protestant Lutheran 181 80,710 15.8
Evangelical Lutheran Synod Evangelical Protestant Lutheran 2 144 0.0
Fellowship of Evangelical Churches Evangelical Protestant European Free-Church 1 92 0.0
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 3 839 0.2
Free Methodist Church of North America Evangelical Protestant Holiness 7 358 0.1
Friends (Quakers) Mainline Protestant European Free-Church 7 574 0.1
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 18 --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 24 --- ---
Independent, Charismatic Churches Evangelical Protestant Pentecostal 9 9,450 1.9
Independent, Non-Charismatic Churches Evangelical Protestant
----
18 28,650 5.6
International Pentecostal Holiness Church Evangelical Protestant Pentecostal 2 56 0.0
Jewish Other Judaism 140 208,577 40.9
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran 2 764 0.1
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 144 83,205 16.3
Mennonite Church USA Evangelical Protestant European Free-Church 22 1,628 0.3
Missionary Church, The Evangelical Protestant Holiness 3 327 0.1
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 7 1,832 0.4
National Association of Free Will Baptists Evangelical Protestant Baptist 2 101 0.0
Netherlands Reformed Congregations Evangelical Protestant Presbyterian-Reformed 1 16 0.0
North American Baptist Conference Evangelical Protestant Baptist 7 1,104 0.2
Old Regular Baptists Evangelical Protestant Baptist 1 7 0.0
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 1 --- ---
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 7 --- ---
Orthodox Church in America: Romanian Orthodox Episcopate of America Orthodox Eastern Liturgical (Orthodox) 2 --- ---
Pentecostal Church of God Evangelical Protestant Pentecostal --- --- ---
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 103 40,909 8.0
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 2 80 0.0
Reformed Church in America Mainline Protestant Presbyterian-Reformed 24 10,692 2.1
Reformed Episcopal Church Evangelical Protestant Episcopalianism/Anglicanism 1 276 0.1
Salvation Army Evangelical Protestant Holiness 18 2,071 0.4
Seventh-day Adventist Church Evangelical Protestant Adventist 56 15,007 2.9
Southern Baptist Convention Evangelical Protestant Baptist 101 32,192 6.3
Syriac Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) 3 1,900 0.4
U.S. Mennonite Brethren Evangelical Protestant European Free-Church 1 25 0.0
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) --- --- ---
Unitarian Universalist Association of Congregations Other Liberal 14 3,090 0.6
United Church of Christ Mainline Protestant Presbyterian-Reformed 116 55,001 10.8
United Methodist Church, The Mainline Protestant Methodist/Pietist 159 57,560 11.3
Wesleyan Church, The Evangelical Protestant Holiness 7 1,165 0.2
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 7 2,335 0.5
Totals: 2,181 3,229,739  

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.