County Membership Report
 Maps and Reports > Select County > County Report
Search Maps & Reports:

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


Bookmark and Share