Democratizing access to the best data on religion since 1997
US RELIGION
US RELIGION

Report Options

Report Year(s)


Add/Change Counties:



Scroll to Report Section:

Main Report
Over Time Chart
Notes

Search Membership Reports


Cook County, Illinois - County Membership Report (2020)

Exact definitions of "congregations" and "adherents" vary by religious body. Congregations may be parishes, churches, synagogues, mosques, temples, or another site where a religious body has regularly scheduled worship services. Adherents generally are members, children who are not members, and others who are not members but are considered participants in the congregation.

[More information on the data sources]

Religious Bodies Tradition Family Congregations Adherents Adherence Rate
Catholic Church Catholic Catholic Liturgical Family 335 1,522,714 288.64
Muslim Estimate Islam Islam Family 68 311,223 58.99
Non-denominational Christian Churches Evangelical Protestant Other Groups Family 484 221,648 42.01
National Missionary Baptist Convention of America Black Protestant Baptist Family 297 125,222 23.74
National Baptist Convention, USA, Inc. Black Protestant Baptist Family 78 59,628 11.30
Jehovah's Witnesses Jehovah's Witnesses Adventist Family 193 48,862 9.26
Church of God in Christ Black Protestant Pentecostal Family 129 43,950 8.33
Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 116 34,541 6.55
United Church of Christ Mainline Protestant Congregationalists (United Church of Christ) Family 95 34,274 6.50
Southern Baptist Convention Evangelical Protestant Baptist Family 169 31,859 6.04
Lutheran Church-Missouri Synod (LCMS) Evangelical Protestant Lutheran Family 105 28,521 5.41
United Methodist Church Mainline Protestant Methodist Family 111 27,311 5.18
Reform Judaism Judaism Judaism Family 18 24,805 4.70
Assemblies of God, General Council of the Evangelical Protestant Pentecostal Family 67 24,026 4.55
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian/Reformed Family 75 21,243 4.03
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) Family 18 19,300 3.66
Buddhism, Mahayana Buddhism Buddhism Family 31 19,246 3.65
Seventh-day Adventist Church Evangelical Protestant Adventist Family 66 18,192 3.45
Orthodox Judaism Judaism Judaism Family 41 16,250 3.08
American Baptist Churches in the U.S.A. Mainline Protestant Baptist Family 46 15,854 3.01
Episcopal Church Mainline Protestant Anglican/Episcopal Family 57 15,736 2.98
Progressive National Baptist Convention, Inc. Black Protestant Baptist Family 29 15,234 2.89
African Methodist Episcopal Church Black Protestant Methodist Family 47 12,689 2.41
Church of Jesus Christ of Latter-day Saints Latter-day Saints Latter-day Saints (Mormonism) Family 22 12,012 2.28
Conservative Judaism Judaism Judaism Family 11 11,213 2.13
Evangelical Covenant Church Evangelical Protestant Methodist Family 46 10,727 2.03
Christian Methodist Episcopal Church Black Protestant Methodist Family 23 8,830 1.67
Buddhism, Theravada Buddhism Buddhism Family 10 8,432 1.60
Christian Churches and Churches of Christ Evangelical Protestant Restorationists Family 13 6,846 1.30
National Baptist Convention of America International, Inc. Black Protestant Baptist Family 12 6,746 1.28
Serbian Orthodox Church in North and South America Orthodox Eastern Liturgical (Orthodox) Family 7 6,397 1.21
Churches of Christ Evangelical Protestant Restorationists Family 43 6,167 1.17
Pentecostal Assemblies of the World Black Protestant Pentecostal Family 5 5,950 1.13
Christian Reformed Church in North America Evangelical Protestant Presbyterian/Reformed Family 27 5,483 1.04
Church of the Nazarene Evangelical Protestant Holiness Family 38 4,812 0.91
Church of God (Anderson, Indiana) Evangelical Protestant Holiness Family 17 4,170 0.79
Reformed Church in America Mainline Protestant Presbyterian/Reformed Family 12 4,161 0.79
Hindu Yoga and Meditation Hinduism 17 4,114 0.78
Full Gospel Christian Assemblies International Evangelical Protestant Pentecostal Family 8 4,060 0.77
Mennonite Church, USA Evangelical Protestant Mennonite/Amish Family 14 3,710 0.70
Presbyterian Church in America Evangelical Protestant Presbyterian/Reformed Family 17 3,508 0.66
Buddhism, Vajrayana Buddhism Buddhism Family 10 3,410 0.65
African Methodist Episcopal Zion Church Black Protestant Methodist Family 9 3,024 0.57
Unitarian Universalist Association Other Christians Liberal Family 10 2,908 0.55
Baha'i Faith Other Other Groups Family 15 2,799 0.53
Full Gospel Baptist Church Fellowship International Black Protestant Baptist Family 12 2,520 0.48
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal Family 44 2,484 0.47
Reconstructionist Judaism Judaism Judaism Family 4 2,379 0.45
International Churches of Christ Evangelical Protestant Baptist Family 1 2,172 0.41
Antiochian Orthodox Christian Archdiocese of North America Orthodox Eastern Liturgical (Orthodox) Family 3 2,100 0.40
Ethiopian Orthodox Church Orthodox Eastern Liturgical (Orthodox) Family 2 2,100 0.40
Orthodox Church in America, The Orthodox Eastern Liturgical (Orthodox) Family 11 2,065 0.39
Hindu, Traditional Temples Hinduism Hinduism Family 5 1,780 0.34
Christian and Missionary Alliance Evangelical Protestant Holiness Family 19 1,689 0.32
Salvation Army Evangelical Protestant Holiness Family 13 1,652 0.31
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran Family 8 1,591 0.30
Association of Vineyard Churches Evangelical Protestant Pentecostal Family 6 1,572 0.30
Christian Church (Disciples of Christ) Mainline Protestant Restorationists Family 15 1,226 0.23
Coptic Orthodox Church Orthodox Eastern Liturgical (Orthodox) Family 2 1,220 0.23
Ukrainian Orthodox Church of the U.S.A. Orthodox Eastern Liturgical (Orthodox) Family 2 1,185 0.22
Advent Christian Church Evangelical Protestant Adventist Family 2 1,099 0.21
Bulgarian Eastern Orthodox Diocese of the USA, Canada, and Australia Orthodox Eastern Liturgical (Orthodox) Family 2 890 0.17
Eritrean Orthodox Church Orthodox Eastern Liturgical (Orthodox) Family 2 880 0.17
Church of our Lord Jesus Christ of the Apostolic Faith, Inc. Black Protestant Pentecostal Family 4 840 0.16
Romanian Orthodox Metropolia of the Americas Orthodox Eastern Liturgical (Orthodox) Family 1 750 0.14
United Reformed Churches in North America Evangelical Protestant Presbyterian/Reformed Family 4 629 0.12
Malankara (Indian) Orthodox Syrian Church Orthodox Eastern Liturgical (Orthodox) Family 3 608 0.12
Armenian Apostolic Church (Catholicosate of Etchmiadzin) Orthodox Eastern Liturgical (Orthodox) Family 3 550 0.10
Albanian Orthodox Diocese of America Orthodox Eastern Liturgical (Orthodox) Family 1 500 0.09
International Church of the Foursquare Gospel Evangelical Protestant Pentecostal Family 7 476 0.09
Macedonian Orthodox Church: American-Canadian Diocese Orthodox Eastern Liturgical (Orthodox) Family 1 475 0.09
Malankara Archdiocese of the Syrian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) Family 2 440 0.08
Missionary Church, The Evangelical Protestant Holiness Family 7 416 0.08
Church of the Genuine Orthodox Christians of America Orthodox Eastern Liturgical (Orthodox) Family 2 350 0.07
Armenian Apostolic Church (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) Family 1 350 0.07
Primitive Baptists Associations Evangelical Protestant Baptist Family 3 338 0.06
National Association of Free Will Baptists Evangelical Protestant Baptist Family 3 281 0.05
Protestant Reformed Churches in America Evangelical Protestant Presbyterian/Reformed Family 2 245 0.05
Wesleyan Church Evangelical Protestant Holiness Family 3 245 0.05
Friends General Conference Mainline Protestant Friends/Brethren Family 3 228 0.04
United House of Prayer Black Protestant 1 210 0.04
Cumberland Presbyterian Church in America Black Protestant Presbyterian/Reformed Family 1 210 0.04
National Association of Congregational Christian Churches Mainline Protestant Congregationalists (United Church of Christ) Family 2 206 0.04
Russian Orthodox Church Outside of Russia, The Orthodox Eastern Liturgical (Orthodox) Family 1 200 0.04
American Carpatho-Russian Orthodox Diocese of the USA Orthodox Eastern Liturgical (Orthodox) Family 2 165 0.03
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian/Reformed Family 1 147 0.03
Apostolic Christian Church of America Evangelical Protestant Froehlich Churches Family 1 142 0.03
Lutheran Congregations in Mission for Christ Evangelical Protestant Lutheran Family 2 140 0.03
General Association of General Baptists Evangelical Protestant Baptist Family 1 130 0.02
Free Methodist Church – USA Evangelical Protestant Holiness Family 3 128 0.02
Open Bible Churches Evangelical Protestant Pentecostal Family 1 120 0.02
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian/Reformed Family 1 117 0.02
Georgian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) Family 1 100 0.02
Church of the Brethren Evangelical Protestant Friends/Brethren Family 3 90 0.02
Friends General Conference and Friends United Meeting, dually aligned meetings Mainline Protestant Friends/Brethren Family 1 77 0.01
Evangelical Friends Church International Evangelical Protestant Friends/Brethren Family 1 74 0.01
Universal Fellowship of Metropolitan Community Churches Mainline Protestant Other Groups Family 2 60 0.01
Syrian (Syriac) Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) Family 1 60 0.01
Cumberland Presbyterian Church Evangelical Protestant Presbyterian/Reformed Family 1 46 0.01
Independent Judaism Judaism 6 40 0.01
Fellowship of Evangelical Churches Evangelical Protestant Mennonite/Amish Family 1 35 0.01
Northern New Salem Association of Old Regular Baptists. Evangelical Protestant Baptist Family 1 13 0.00
Swedenborgian Church Other Christians Spiritualist Family 1 4 0.00
Chabad Judaism Judaism 32
Every Nation Evangelical Protestant 1
American Ethical Union Other Liberal Family 1
Unification Church Other Other Groups Family 1
ECO: A Covenant Order of Evangelical Presbyterians Evangelical Protestant Presbyterian/Reformed Family 3
Grace Communion International Evangelical Protestant 2
The Local Churches Evangelical Protestant 4
Fellowship of Christian Assemblies Evangelical Protestant Pentecostal Family 3
Church of the Living God (Christian Workers for Fellowship) Black Protestant Pentecostal Family 3
The Church of God Evangelical Protestant 1
Orthodox Old Roman Catholic Communion Catholic Other Groups Family 2
Concordia Lutheran Conference Evangelical Protestant 3
Christian Congregation in North America Evangelical Protestant Pentecostal Family 1
Alliance of Baptists Mainline Protestant Baptist Family 2
Anglican Church in North America Evangelical Protestant Anglican/Episcopal Family 11
Apostolic Faith Mission of Portland, Oregon Evangelical Protestant Pentecostal Family 1
Baptist Missionary Association of America Evangelical Protestant Baptist Family 2
Brethren in Christ Church Evangelical Protestant Friends/Brethren Family 1
Church of Christ (Holiness) U.S.A Evangelical Protestant Holiness Family 6
Church of Christ, Scientist Other Christians Christian Science Family 5
Unity Churches, Association of Other Christians Other Groups Family 8
General Conference of the Church of God (Seventh Day) Evangelical Protestant Adventist Family 6
Church of God of Prophecy Evangelical Protestant Pentecostal Family 4
Communion of Reformed Evangelical Churches Evangelical Protestant Presbyterian/Reformed Family 1
Community of Christ Evangelical Protestant Latter-day Saints (Mormonism) Family 2
Conservative Baptist Association of America (CBAmerica) Evangelical Protestant Baptist Family 9
Evangelical Free Church of America Evangelical Protestant Methodist Family 35
General Church of the New Jerusalem Other Christians Spiritualist Family 2
Grace Gospel Fellowship Evangelical Protestant Independent Fundamentalist Family 1
International Council of Community Churches Mainline Protestant Presbyterian/Reformed Family 4
Jain Other Other Groups Family 1
National Spiritualist Association of Churches Other Spiritualist Family 2
Netherlands Reformed Congregations Evangelical Protestant Presbyterian/Reformed Family 1
New Testament Association of Independent Baptist Churches Evangelical Protestant Baptist Family 2
New Apostolic Church USA Other Christians Other Groups Family 4
North American Baptist Conference Evangelical Protestant Baptist Family 7
North American Lutheran Church Evangelical Protestant Lutheran Family 2
Orthodox Presbyterian Church Evangelical Protestant Presbyterian/Reformed Family 3
Pentecostal Fire-Baptized Holiness Church Evangelical Protestant Pentecostal Family 4
Polish National Catholic Church of America Catholic Catholic Liturgical Family 5
Christian Brethren (Plymouth Brethren) Evangelical Protestant Independent Fundamentalist Family 18
Reformed Episcopal Church Evangelical Protestant Anglican/Episcopal Family 1
General Association of Regular Baptist Churches Evangelical Protestant Baptist Family 4
American Sikh Council Other Other Groups Family 2
Union of Messianic Jewish Congregations Other Christians Other Groups Family 1
United Pentecostal Church International Evangelical Protestant Pentecostal Family 20
           

Religious Traditions (1980 - 2020), Percent of Population


The population of this county was 5,275,541 in 2020. The adherent totals of the religious groups listed above (2,862,646) included 54.3% of the total population in 2020. The adherence rate is the number of adherents of a given group per 1,000 people in the general population.

Note that data collection methods for religious bodies change over time, affecting the comparability of statistics. For further information, see the U.S. Religion Census website at https://www.usreligioncensus.org/.

The 2020 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include data for 372 religious bodies or groups. Of these, the ASARB was able to gather data on congregations and adherents for 217 and on congregations only for 155.

[More information on the data sources]

Our Sponsors

Our Affiliates

US RELIGION
WORLD RELIGION
DATA ARCHIVE
RESEARCH
TEACHING
CONGREGATIONS
ABOUT
© 2024 The Association of Religion Data Archives. All rights reserved.