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Illinois

Religious Traditions, 2010

1,649,402 220,435 933,690 3,648,907 76,138 566,260 5,735,800
Evangelical Protestant Black Protestant Mainline Protestant Catholic Orthodox 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
Albanian Orthodox Diocese of America Orthodox Eastern Liturgical (Orthodox) 1 270 0.02
Allegheny Wesleyan Methodist Connection Evangelical Protestant Methodist/Pietist 1 18 0.00
American Baptist Association, The Evangelical Protestant Baptist 19 1,146 0.09
American Baptist Churches in the USA Mainline Protestant Baptist 296 87,962 7.08
American Carpatho-Russian Orthodox Diocese Orthodox Eastern Liturgical (Orthodox) 2 414 0.03
Amish; Other Groups Evangelical Protestant European Free-Church 5 431 0.03
Antiochian Orthodox Christian Archdiocese of North America, The Orthodox Eastern Liturgical (Orthodox) 5 1,890 0.15
Apostolic Catholic Assyrian Church of the East, North American Dioceses Orthodox Eastern Liturgical (Orthodox) 4 22,785 1.83
Apostolic Christian Church of America, Inc. Evangelical Protestant European Free-Church 19 9,812 0.79
Apostolic Christian Churches (Nazarene) Evangelical Protestant European Free-Church 4 558 0.04
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) 3 1,421 0.11
Armenian Church of North America (Catholicosate of Etchmiadzin) Orthodox Eastern Liturgical (Orthodox) 5 4,296 0.35
Assemblies of God Evangelical Protestant Pentecostal 337 96,893 7.80
Association of Free Lutheran Congregations Evangelical Protestant Lutheran 15 3,959 0.32
Bahá'í Other Other Groups 45 5,327 0.43
Baptist Missionary Association of America Evangelical Protestant Baptist 14 1,201 0.10
Beachy Amish Mennonite Churches* Evangelical Protestant European Free-Church 4 367 0.03
Brethren Church, The (Ashland, Ohio) Evangelical Protestant European Free-Church 3 521 0.04
Brethren In Christ Church Evangelical Protestant European Free-Church 1 63 0.01
Buddhists Other Other Groups 63 --- ---
Bulgarian Eastern Orthodox Diocese of the USA, Canada and Australia Orthodox Eastern Liturgical (Orthodox) 2 1,260 0.10
Calvary Chapel Fellowship Churches Evangelical Protestant Pentecostal 9 --- ---
Catholic Church Catholic Catholicism 1,125 3,874,933 312.01
Christian and Missionary Alliance, The Evangelical Protestant Holiness 54 6,222 0.50
Christian Church (Disciples of Christ) Mainline Protestant Baptist 170 56,638 4.56
Christian Churches and Churches of Christ Evangelical Protestant Baptist 519 134,325 10.82
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 48 18,866 1.52
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 105 10,028 0.81
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 123 18,246 1.47
Church of God General Conference Evangelical Protestant Adventist 13 792 0.06
Church of God in Christ, Mennonite Evangelical Protestant European Free-Church 1 30 0.00
Church of God of Prophecy Evangelical Protestant Pentecostal 21 1,118 0.09
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 116 35,859 2.89
Church of the Brethren Evangelical Protestant European Free-Church 45 6,206 0.50
Church of the Nazarene Evangelical Protestant Holiness 247 38,050 3.06
Churches of Christ Evangelical Protestant Baptist 293 29,295 2.36
Churches of God, General Conference Evangelical Protestant Presbyterian-Reformed 27 4,413 0.36
Community of Christ Other Latter-day Saints 54 4,395 0.35
Conservative Baptist Association of America Evangelical Protestant Baptist 33 7,575 0.61
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed 10 2,146 0.17
Conservative Mennonite Conference Evangelical Protestant European Free-Church 2 375 0.03
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 78 19,217 1.55
Cumberland Presbyterian Church Evangelical Protestant Presbyterian-Reformed 40 2,959 0.24
Eastern Pennsylvania Mennonite Church Evangelical Protestant European Free-Church 3 286 0.02
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 200 52,578 4.23
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 69 17,759 1.43
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 127 29,402 2.37
Evangelical Lutheran Church in America Mainline Protestant Lutheran 553 279,724 22.52
Evangelical Presbyterian Church Evangelical Protestant Presbyterian-Reformed 4 694 0.06
Fellowship of Evangelical Churches Evangelical Protestant European Free-Church 12 2,442 0.20
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 56 10,785 0.87
Free Methodist Church of North America Evangelical Protestant Holiness 69 5,818 0.47
Friends (Quakers) Mainline Protestant European Free-Church 26 2,358 0.19
General Association of Regular Baptist Churches Evangelical Protestant Baptist 69 9,552 0.77
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 35 36,801 2.96
Greek Orthodox Archdiocese of Vasiloupulis Orthodox Eastern Liturgical (Orthodox) 1 1,200 0.10
Hindus Other Other Groups 30 --- ---
Holy Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 1 18 0.00
Independent, Charismatic Churches Evangelical Protestant Pentecostal 17 11,398 0.92
Independent, Non-Charismatic Churches Evangelical Protestant
----
47 50,545 4.07
International Churches of Christ Evangelical Protestant Baptist 4 5,108 0.41
International Council of Community Churches Mainline Protestant Presbyterian-Reformed 17 8,424 0.68
International Pentecostal Holiness Church Evangelical Protestant Pentecostal 6 223 0.02
Jain Other Other Groups 2 --- ---
Jewish Other Judaism 161 270,000 21.74
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 521 278,008 22.39
Macedonian Orthodox Church: American Diocese Orthodox Eastern Liturgical (Orthodox) 2 1,800 0.14
Malankara Archdiocese of the Syrian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 2 300 0.02
Malankara Orthodox Syrian Church Orthodox Eastern Liturgical (Orthodox) 3 1,000 0.08
Mennonite Church USA Evangelical Protestant European Free-Church 52 8,589 0.69
Mennonite; Other Groups Evangelical Protestant European Free-Church 3 186 0.01
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 6 359 0.03
Missionary Church, The Evangelical Protestant Holiness 13 3,183 0.26
Moravian Church in America--Northern Province Mainline Protestant Methodist/Pietist 1 298 0.02
Muslim Estimate Other Other Groups 79 125,203 10.08
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 29 4,979 0.40
National Association of Free Will Baptists Evangelical Protestant Baptist 41 4,351 0.35
National Primitive Baptist Convention, USA Evangelical Protestant Baptist 5 669 0.05
Netherlands Reformed Congregations Evangelical Protestant Presbyterian-Reformed 1 31 0.00
New Testament Association of Independent Baptist Churches and other Fundamental Bapti Evangelical Protestant Baptist 89 24,871 2.00
North American Baptist Conference Evangelical Protestant Baptist 11 2,012 0.16
Old Order Amish Evangelical Protestant European Free-Church 34 2,306 0.19
Old Order Mennonite Evangelical Protestant European Free-Church 1 35 0.00
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 11 3,428 0.28
Orthodox Church in America: Bulgarian Diocese Orthodox Eastern Liturgical (Orthodox) 2 1,986 0.16
Orthodox Church in America: Romanian Orthodox Episcopate of America Orthodox Eastern Liturgical (Orthodox) 2 3,000 0.24
Orthodox Presbyterian Church, The Evangelical Protestant Presbyterian-Reformed 8 808 0.07
Patriarchal Parishes of the Russian Orthodox Church in the USA Orthodox Eastern Liturgical (Orthodox) 1 --- ---
Pentecostal Church of God Evangelical Protestant Pentecostal 25 2,460 0.20
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 453 133,977 10.79
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 44 8,570 0.69
Primitive Baptist Church, The Evangelical Protestant Baptist 33 --- ---
Primitive Methodist Church in the USA Evangelical Protestant Methodist/Pietist 1 61 0.00
Progressive Primitive Baptists Evangelical Protestant Baptist 2 68 0.01
Protestant Reformed Churches in America Evangelical Protestant Presbyterian-Reformed 3 654 0.05
Reformed Baptist Churches Evangelical Protestant Baptist 3 --- ---
Reformed Church in America Mainline Protestant Presbyterian-Reformed 53 17,936 1.44
Reformed Mennonite Church Evangelical Protestant European Free-Church 1 53 0.00
Romanian Orthodox Archdiocese in Americas Orthodox Eastern Liturgical (Orthodox) 1 525 0.04
Russian Orthodox Church Outside of Russia Orthodox Eastern Liturgical (Orthodox) 2 --- ---
Salvation Army Evangelical Protestant Holiness 56 22,765 1.83
Separate Baptists in Christ Evangelical Protestant Baptist 8 567 0.05
Serbian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 5 8,430 0.68
Serbian Orthodox Church in the USA (New Gracanica Metropolitanate) Orthodox Eastern Liturgical (Orthodox) 5 --- ---
Seventh-day Adventist Church Evangelical Protestant Adventist 134 25,046 2.02
Sikh Other Other Groups 3 --- ---
Southern Baptist Convention Evangelical Protestant Baptist 981 305,838 24.63
Southwide Baptist Fellowship Evangelical Protestant Baptist 7 --- ---
Syriac Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) 1 270 0.02
Tao Other Other Groups 1 --- ---
U.S. Mennonite Brethren Evangelical Protestant European Free-Church 1 14 0.00
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) 4 1,728 0.14
Unitarian Universalist Association of Congregations Other Liberal 36 7,244 0.58
United Church of Christ Mainline Protestant Presbyterian-Reformed 390 166,772 13.43
United Methodist Church, The Mainline Protestant Methodist/Pietist 1,388 365,182 29.40
United Reformed Churches in North America Evangelical Protestant Presbyterian-Reformed 4 860 0.07
Vineyard USA Evangelical Protestant Pentecostal 24 7,282 0.59
Wesleyan Church, The Evangelical Protestant Holiness 28 6,961 0.56
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 33 9,563 0.77
Zoroastrian Other Other Groups 3 --- ---
Totals: 10,140 6,867,625  

The population of Illinois was 12,419,293 in 2000; in 1990 it was 11,430,602. The total population changed 8.6%. The adherent totals of the religious groups listed above (6,867,625) included 55.3% 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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