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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 431 2,303,743 438.5
Evangelical Lutheran Church in America Mainline Protestant Lutheran 187 103,055 19.6
United Methodist Church, The Mainline Protestant Methodist/Pietist 154 71,048 13.5
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 145 101,364 19.3
United Church of Christ Mainline Protestant Presbyterian-Reformed 119 57,214 10.9
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 113 51,737 9.8
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 80 31,430 6.0
Southern Baptist Convention Evangelical Protestant Baptist 72 21,081 4.0
American Baptist Churches in the USA Mainline Protestant Baptist 59 22,812 4.3
Assemblies of God Evangelical Protestant Pentecostal 48 7,891 1.5
Churches of Christ Evangelical Protestant Restoration Movement 47 5,829 1.1
Jewish Other Judaism 44 37,423 7.1
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 41 3,613 0.7
Seventh-day Adventist Church Evangelical Protestant Adventist 36 9,833 1.9
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 34 8,104 1.5
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 33 12,795 2.4
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 31 6,927 1.3
Christian Brethren Evangelical Protestant Ind. Fundamentalist 24 2,400 0.5
Reformed Church in America Mainline Protestant Presbyterian-Reformed 24 11,600 2.2
Church of the Nazarene Evangelical Protestant Holiness 23 4,918 0.9
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 23 3,289 0.6
Christian Churches and Churches of Christ Evangelical Protestant Restoration Movement 22 3,671 0.7
Christian Church (Disciples of Christ) Mainline Protestant Restoration Movement 21 5,491 1.0
Conservative Baptist Association of America Evangelical Protestant Baptist 19 5,113 1.0
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 18 7,503 1.4
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 15 6,464 1.2
Salvation Army Evangelical Protestant Holiness 14 4,394 0.8
Unitarian Universalist Association of Congregations Other Liberal 14 4,581 0.9
Christian and Missionary Alliance, The Evangelical Protestant Holiness 12 1,223 0.2
Christian Methodist Episcopal Church Black Protestant Methodist/Pietist 11 17,654 3.4
Mennonite Church Evangelical Protestant European Free-Church 10 583 0.1
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 8 16,090 3.1
North American Baptist Conference Evangelical Protestant Baptist 7 883 0.2
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 6 2,336 0.4
Friends (Quakers) Mainline Protestant European Free-Church 5 455 0.1
Free Methodist Church of North America Evangelical Protestant Holiness 4 846 0.2
Mennonite Church, The General Conference Evangelical Protestant European Free-Church 4 334 0.1
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 4 676 0.1
Church of the Brethren Evangelical Protestant European Free-Church 3 316 0.1
Evangelical Congregational Church, The Evangelical Protestant Methodist/Pietist 3 152 0.0
Missionary Church, The Evangelical Protestant Holiness 3 271 0.1
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 3 535 0.1
Advent Christian Church Evangelical Protestant Adventist 2 270 0.1
Baptist Missionary Association of America Evangelical Protestant Baptist 2 53 0.0
Christ Catholic Church Evangelical Protestant Catholicism 2 106 0.0
Estonian Evangelical Lutheran Church Mainline Protestant Lutheran 2 428 0.1
Evangelical Lutheran Synod Evangelical Protestant Lutheran 2 151 0.0
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 2 701 0.1
International Pentecostal Holiness Church Evangelical Protestant Pentecostal 2 65 0.0
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran 2 981 0.2
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 2 800 0.2
Separate Baptists in Christ Evangelical Protestant Baptist 2 88 0.0
Swedenborgian Church Other Spiritualist 2 145 0.0
Syriac Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) 2 845 0.2
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) 1 437 0.1
Christian Catholic Church Other Other Groups 1 50 0.0
Church of God (Seventh Day) Evangelical Protestant Adventist 1 37 0.0
Church of the Lutheran Confession Evangelical Protestant Lutheran 1 63 0.0
Cumberland Presbyterian Church Evangelical Protestant Presbyterian-Reformed 1 7 0.0
Fellowship of Evangelical Churches Evangelical Protestant European Free-Church 1 76 0.0
General Church of the New Jerusalem Other Spiritualist 1 259 0.0
Orthodox Presbyterian Church, The Evangelical Protestant Presbyterian-Reformed 1 45 0.0
Protestant Reformed Churches in America Evangelical Protestant Presbyterian-Reformed 1 435 0.1
Reformed Episcopal Church Evangelical Protestant Episcopalianism/Anglicanism 1 357 0.1
Reformed Presbyterian Church of North America Evangelical Protestant Presbyterian-Reformed 1 33 0.0
Romanian Orthodox Archdiocese in Americas Orthodox Eastern Liturgical (Orthodox) 1 2,957 0.6
U.S. Mennonite Brethren Evangelical Protestant European Free-Church 1 49 0.0
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) 1 340 0.1
Brethren In Christ Church Evangelical Protestant European Free-Church --- --- ---
Totals: 2,012 2,967,455  

The population of Cook County, Illinois was 5,253,655 in 1980. The adherent totals of the religious groups listed above (2,967,455) included 56.5% of the total population in 1980.

* 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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