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Iowa - State Membership Report (2000)

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 508 558,092 190.71
Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 510 268,543 91.77
United Methodist Church Mainline Protestant Methodist Family 862 248,211 84.82
Lutheran Church-Missouri Synod (LCMS) Evangelical Protestant Lutheran Family 294 120,075 41.03
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian/Reformed Family 306 69,974 23.91
Christian Church (Disciples of Christ) Mainline Protestant Restorationists Family 146 55,157 18.85
United Church of Christ Mainline Protestant Congregationalists (United Church of Christ) Family 195 49,205 16.81
Reformed Church in America Mainline Protestant Presbyterian/Reformed Family 78 36,709 12.54
Assemblies of God, General Council of the Evangelical Protestant Pentecostal Family 137 28,026 9.58
American Baptist Churches in the U.S.A. Mainline Protestant Baptist Family 113 25,646 8.76
Christian Churches and Churches of Christ Evangelical Protestant Restorationists Family 128 25,391 8.68
Christian Reformed Church in North America Evangelical Protestant Presbyterian/Reformed Family 57 21,725 7.42
Church of Jesus Christ of Latter-day Saints Latter-day Saints Latter-day Saints (Mormonism) Family 62 15,236 5.21
General Association of Regular Baptist Churches Evangelical Protestant Baptist Family 101 14,390 4.92
Southern Baptist Convention Evangelical Protestant Baptist Family 75 13,322 4.55
Evangelical Free Church of America Evangelical Protestant Methodist Family 79 13,087 4.47
Episcopal Church Mainline Protestant Anglican/Episcopal Family 64 12,730 4.35
Independent, Non-Charismatic Churches Evangelical Protestant Other Groups Family 13 11,110 3.80
Church of the Nazarene Evangelical Protestant Holiness Family 70 11,011 3.76
Salvation Army Evangelical Protestant Holiness Family 19 9,230 3.15
Converge Worldwide Evangelical Protestant Baptist Family 31 6,433 2.20
Jewish Congregations Judaism Judaism Family 16 6,400 2.19
Community of Christ Evangelical Protestant Latter-day Saints (Mormonism) Family 61 6,137 2.10
Wesleyan Church Evangelical Protestant Holiness Family 28 5,952 2.03
Independent, Charismatic Churches Evangelical Protestant Pentecostal Family 6 5,000 1.71
Muslim Estimate Islam Islam Family 9 4,717 1.61
Christian and Missionary Alliance Evangelical Protestant Holiness Family 24 4,694 1.60
International Church of the Foursquare Gospel Evangelical Protestant Pentecostal Family 28 4,654 1.59
Friends (Quakers) Mainline Protestant Friends/Brethren Family 61 4,637 1.58
Seventh-day Adventist Church Evangelical Protestant Adventist Family 47 4,476 1.53
Churches of Christ Evangelical Protestant Restorationists Family 71 4,229 1.45
Mennonite Church, USA Evangelical Protestant Mennonite/Amish Family 22 3,926 1.34
Church of the Brethren Evangelical Protestant Friends/Brethren Family 27 3,423 1.17
Evangelical Covenant Church Evangelical Protestant Methodist Family 18 2,622 0.90
Conservative Baptist Association of America (CBAmerica) Evangelical Protestant Baptist Family 12 2,615 0.89
Old Order Amish Mennonite Church Evangelical Protestant Mennonite/Amish Family 38 2,601 0.89
North American Baptist Conference Evangelical Protestant Baptist Family 14 2,304 0.79
National Association of Congregational Christian Churches Mainline Protestant Congregationalists (United Church of Christ) Family 12 2,177 0.74
Apostolic Christian Church of America Evangelical Protestant Froehlich Churches Family 8 2,116 0.72
Association of Vineyard Churches Evangelical Protestant Pentecostal Family 9 2,085 0.71
Unitarian Universalist Association Other Christians Liberal Family 11 1,816 0.62
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) Family 6 1,758 0.60
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran Family 12 1,756 0.60
Netherlands Reformed Congregations Evangelical Protestant Presbyterian/Reformed Family 2 1,585 0.54
International Council of Community Churches Mainline Protestant Presbyterian/Reformed Family 3 1,351 0.46
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal Family 18 1,217 0.42
Presbyterian Church in America Evangelical Protestant Presbyterian/Reformed Family 8 1,143 0.39
Baha'i Faith Other Other Groups Family 9 1,012 0.35
Antiochian Orthodox Christian Archdiocese of North America Orthodox Eastern Liturgical (Orthodox) Family 2 992 0.34
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian/Reformed Family 5 899 0.31
United Reformed Churches in North America Evangelical Protestant Presbyterian/Reformed Family 4 874 0.30
Protestant Reformed Churches in America Evangelical Protestant Presbyterian/Reformed Family 3 788 0.27
Association of Free Lutheran Congregations Evangelical Protestant Lutheran Family 7 721 0.25
Free Methodist Church – USA Evangelical Protestant Holiness Family 18 719 0.25
Pentecostal Church of God Evangelical Protestant Pentecostal Family 6 714 0.24
Conservative Mennonite Conference Evangelical Protestant Mennonite/Amish Family 5 684 0.23
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian/Reformed Family 5 563 0.19
Christian Union Evangelical Protestant Other Groups Family 8 453 0.15
Churches of God, General Conference Evangelical Protestant Presbyterian/Reformed Family 7 451 0.15
Evangelical Presbyterian Church (1981) Evangelical Protestant Presbyterian/Reformed Family 1 426 0.15
Church of God of Prophecy Evangelical Protestant Pentecostal Family 10 421 0.14
Missionary Church, The Evangelical Protestant Holiness Family 4 392 0.13
Church of God (Anderson, Indiana) Evangelical Protestant Holiness Family 10 333 0.11
Beachy Amish Mennonite Churches Evangelical Protestant Mennonite/Amish Family 2 208 0.07
Church of God in Christ, Mennonite Evangelical Protestant Mennonite/Amish Family 3 203 0.07
Old Order Mennonite Evangelical Protestant Mennonite/Amish Family 3 199 0.07
Reformed Church in the United States Evangelical Protestant Presbyterian/Reformed Family 1 157 0.05
Orthodox Presbyterian Church Evangelical Protestant Presbyterian/Reformed Family 3 146 0.05
International Churches of Christ Evangelical Protestant Baptist Family 1 142 0.05
Universal Fellowship of Metropolitan Community Churches Mainline Protestant Other Groups Family 2 142 0.05
Cumberland Presbyterian Church Evangelical Protestant Presbyterian/Reformed Family 1 134 0.05
New Testament Association of Independent Baptist Churches and other Fundamental Baptists Evangelical Protestant Baptist Family 3 134 0.05
Mennonite; Other Groups Evangelical Protestant Mennonite/Amish Family 4 131 0.04
Church of God General Conference (Abrahamic Faith, McDonough, GA) Evangelical Protestant Adventist Family 4 121 0.04
Primitive Methodist Church in the U.S.A. Evangelical Protestant Methodist Family 2 121 0.04
International Pentecostal Holiness Church Evangelical Protestant Pentecostal Family 3 110 0.04
Brethren Church (Ashland, Ohio) Evangelical Protestant Friends/Brethren Family 1 98 0.03
Armenian Apostolic Church (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) Family 1 80 0.03
Old Order Yorker River Brethren Evangelical Protestant Friends/Brethren Family 1 63 0.02
American Baptist Association Evangelical Protestant Baptist Family 1 37 0.01
Greek Orthodox Archdiocese of Vasiloupolis Orthodox Eastern Liturgical (Orthodox) Family 1 35 0.01
Brethren in Christ Church Evangelical Protestant Friends/Brethren Family 1 29 0.01
National Association of Free Will Baptists Evangelical Protestant Baptist Family 2 0 0.00
Buddhists Buddhism Buddhism Family 7
Calvary Chapel Evangelical Protestant Pentecostal Family 2
Hindus Hinduism Hinduism Family 3
Primitive Baptists Evangelical Protestant Baptist Family 6
Reformed Baptist Church Evangelical Protestant Baptist Family 1
American Sikh Council Other Other Groups Family 2
           

Religious Traditions (1980 - 2020), Percent of Population


The population of this state was 2,926,324 in 2000. The adherent totals of the religious groups listed above (1,711,426) included 58.5% of the total population in 2000. 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]

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