State Membership Report
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Iowa

Denominational Groups, 2000

346,243 775,045 2,865 558,092 29,181 1,214,898
Evangelical Protestant Mainline Protestant Orthodox Catholic Other Unclaimed

Congregational "adherents" include all full members, their children, and others who regularly attend services. The historically African American denominations are not included in the 2000 congregation and membership totals. Many are also missing in 1990 and most historically African American denominations are missing in the 1980 reports.
[More information on the data sources]

Reports


Religious Bodies Theology Congregations Adherents Adherence Rate
Catholic Church Catholic 508 558,092 190.7
American Baptist Association, The Evangelical Protestant 1 37 0.0
Apostolic Christian Church of America, Inc. Evangelical Protestant 8 2,116 0.7
Assemblies of God Evangelical Protestant 137 28,026 9.6
Association of Free Lutheran Congregations, The Evangelical Protestant 7 721 0.3
Baptist General Conference Evangelical Protestant 31 6,433 2.2
Beachy Amish Mennonite Churches Evangelical Protestant 2 208 0.1
Brethren Church, The (Ashland, Ohio) Evangelical Protestant 1 98 0.0
Brethren In Christ Church Evangelical Protestant 1 29 0.0
Calvary Chapel Fellowship Churches Evangelical Protestant 2 n.a. n.a.
Christian and Missionary Alliance, The Evangelical Protestant 24 4,694 1.6
Christian Churches and Churches of Christ Evangelical Protestant 128 25,391 8.7
Christian Reformed Church in North America Evangelical Protestant 57 21,725 7.4
Christian Union Evangelical Protestant 8 453 0.2
Church of God (Anderson, Indiana) Evangelical Protestant 10 333 0.1
Church of God (Cleveland, Tennessee) Evangelical Protestant 18 1,217 0.4
Church of God General Conference Evangelical Protestant 4 121 0.0
Church of God in Christ, Mennonite Evangelical Protestant 3 203 0.1
Church of God of Prophecy Evangelical Protestant 10 421 0.1
Church of the Brethren Evangelical Protestant 27 3,423 1.2
Church of the Nazarene Evangelical Protestant 70 11,011 3.8
Churches of Christ Evangelical Protestant 71 4,229 1.5
Churches of God, General Conference Evangelical Protestant 7 451 0.2
Community of Christ Evangelical Protestant 61 6,137 2.1
Conservative Baptist Association of America Evangelical Protestant 12 2,615 0.9
Conservative Congregational Christian Conference Evangelical Protestant 5 899 0.3
Conservative Mennonite Conference Evangelical Protestant 5 684 0.2
Cumberland Presbyterian Church Evangelical Protestant 1 134 0.1
Evangelical Covenant Church, The Evangelical Protestant 18 2,622 0.9
Evangelical Free Church of America, The Evangelical Protestant 79 13,087 4.5
Evangelical Presbyterian Church Evangelical Protestant 1 426 0.2
Free Methodist Church of North America Evangelical Protestant 18 719 0.3
General Association of Regular Baptist Churches Evangelical Protestant 101 14,390 4.9
Independent, Charismatic Churches Evangelical Protestant 6 5,000 1.7
Independent, Non-Charismatic Churches Evangelical Protestant 13 11,110 3.8
International Church of the Foursquare Gospel Evangelical Protestant 28 4,654 1.6
International Churches of Christ Evangelical Protestant 1 142 0.1
International Pentecostal Holiness Church Evangelical Protestant 3 110 0.0
Lutheran Church--Missouri Synod Evangelical Protestant 294 120,075 41.0
Mennonite Church USA Evangelical Protestant 22 3,926 1.3
Mennonite; Other Groups Evangelical Protestant 4 131 0.0
Missionary Church, The Evangelical Protestant 4 392 0.1
National Association of Free Will Baptists Evangelical Protestant 2 0 0.0
Netherlands Reformed Congregations Evangelical Protestant 2 1,585 0.5
New Testament Association of Independent Baptist Churches and other Fundamental Baptist Associations/Fellowships Evangelical Protestant 3 134 0.1
North American Baptist Conference Evangelical Protestant 14 2,304 0.8
Old Order Amish Church Evangelical Protestant 38 2,601 0.9
Old Order Mennonite Evangelical Protestant 3 199 0.1
Old Order River Brethren Evangelical Protestant 1 63 0.0
Orthodox Presbyterian Church, The Evangelical Protestant 3 146 0.1
Pentecostal Church of God Evangelical Protestant 6 714 0.2
Presbyterian Church in America Evangelical Protestant 8 1,143 0.4
Primitive Baptist Churches--Old Line Evangelical Protestant 6 n.a. n.a.
Primitive Methodist Church in the USA Evangelical Protestant 2 121 0.0
Protestant Reformed Churches in America Evangelical Protestant 3 788 0.3
Reformed Baptist Churches Evangelical Protestant 1 n.a. n.a.
Reformed Church in the United States Evangelical Protestant 1 157 0.1
Salvation Army, The Evangelical Protestant 19 9,230 3.2
Seventh-day Adventist Church Evangelical Protestant 47 4,476 1.5
Southern Baptist Convention Evangelical Protestant 75 13,322 4.6
United Reformed Churches in North America Evangelical Protestant 4 874 0.3
Vineyard USA Evangelical Protestant 9 2,085 0.7
Wesleyan Church, The Evangelical Protestant 28 5,952 2.0
Wisconsin Evangelical Lutheran Synod Evangelical Protestant 12 1,756 0.6
American Baptist Churches in the USA Mainline Protestant 113 25,646 8.8
Christian Church (Disciples of Christ) Mainline Protestant 146 55,157 18.9
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant 5 563 0.2
Episcopal Church Mainline Protestant 64 12,730 4.4
Evangelical Lutheran Church in America Mainline Protestant 510 268,543 91.8
Friends (Quakers) Mainline Protestant 61 4,637 1.6
International Council of Community Churches Mainline Protestant 3 1,351 0.5
National Association of Congregational Christian Churches Mainline Protestant 12 2,177 0.7
Presbyterian Church (U.S.A.) Mainline Protestant 306 69,974 23.9
Reformed Church in America Mainline Protestant 78 36,709 12.5
United Church of Christ Mainline Protestant 195 49,205 16.8
United Methodist Church, The Mainline Protestant 862 248,211 84.8
Universal Fellowship of Metropolitan Community Churches Mainline Protestant 2 142 0.1
Antiochian Orthodox Christian Archdiocese of North America, The Orthodox 2 992 0.3
Armenian Apostolic Church / Catholicossate of Cilicia Orthodox 1 80 0.0
Greek Orthodox Archdiocese of America Orthodox 6 1,758 0.6
Greek Orthodox Archdiocese of Vasiloupulis Orthodox 1 35 0.0
Bahá'í Other Theology 9 1,012 0.4
Buddhism Other Theology 7 n.a. n.a.
Church of Jesus Christ of Latter-day Saints, The Other Theology 62 15,236 5.2
Hindu Other Theology 3 n.a. n.a.
Jewish Estimate Other Theology 16 6,400 2.2
Muslim Estimate Other Theology 9 4,717 1.6
Sikh Other Theology 2 n.a. n.a.
Unitarian Universalist Association of Congregations Other Theology 11 1,816 0.6
Totals (Unadjusted)*: 4,584 1,711,426  
Total (Adjusted)**:   1,911,950  
The population of these 99 counties (or equivalents) in 1990 was 2,776,755; in 2000 it was 2,926,324. The total population changed 5.4%. The unadjusted adherent totals of the religious groups listed above (1,711,426) include 58.5% of the total population in 2000. The adjusted total adherents (1,911,950) include 65.3% of the population.

Source

*The “Unadjusted Totals” come from the 1990 and 2000 data collected by representatives of the Association of Statisticians of American Religious Bodies (ASARB). While quite comprehensive, this data excludes most of the historically African-American denominations and some other major groups. As a result, these numbers will be an underestimate of the total adherence rate, particularly in areas with a large African-American population. The 2000 data included 149 religious groups and the final results are published in Religious Congregations and Membership in the United States 2000. Copyright © 2002, All rights reserved. The 1990 data included 132 groups and the final results are published in Churches and Church Membership in the United States 1990 Copyright © 1990, All rights reserved. Published by Glenmary Research Center, 1312 Fifth Ave., North, Nashville, TN 37208. www.glenmary.org [More information on the data collection]

**The “Adjusted Totals” include all adherents in the denominations counted by the Association of Statisticians of American Religious Bodies (ASARB) and estimates adherent totals for the historically African-American denominations and other religious groups not listed in the ASARB totals. An article by Roger Finke and Christopher P. Scheitle (2005) reviews how these estimates were computed.

The adherence rate provides the number of adherents of a particular group per 1,000 population. For example, in 2000 the Episcopal Church had an adherence rate of approximately 8 (8.1) in Autauga County, Alabama. This means that 8 out of every 1,000 people in Autauga County are Episcopalian.

[More information on the data source]