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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 % Change
American Baptist Churches in the USA Mainline Protestant -19 -9,573 -27.0%
Apostolic Christian Church of America, Inc. Evangelical Protestant +8 +2,116 n.a.
Assemblies of God Evangelical Protestant +20 +3,481 14.0%
Association of Free Lutheran Congregations, The Evangelical Protestant +6 +518 255.0%
Baptist General Conference Evangelical Protestant 0 +768 14.0%
Beachy Amish Mennonite Churches Evangelical Protestant 0 -9 -4.0%
Brethren Church, The (Ashland, Ohio) Evangelical Protestant -1 -182 -65.0%
Brethren In Christ Church Evangelical Protestant -1 -143 -83.0%
Catholic Church Catholic -81 +18,610 3.0%
Christian and Missionary Alliance, The Evangelical Protestant +7 +2,345 100.0%
Christian Church (Disciples of Christ) Mainline Protestant -27 +546 1.0%
Christian Churches and Churches of Christ Evangelical Protestant -6 +2,051 9.0%
Christian Reformed Church in North America Evangelical Protestant -2 +539 2.0%
Christian Union Evangelical Protestant 0 -229 -34.0%
Church of God (Anderson, Indiana) Evangelical Protestant 0 -1,155 -78.0%
Church of God (Cleveland, Tennessee) Evangelical Protestant +3 +456 60.0%
Church of God General Conference Evangelical Protestant +2 +39 48.0%
Church of God of Prophecy Evangelical Protestant +10 +421 n.a.
Church of Jesus Christ of Latter-day Saints, The Other Theology +35 +7,562 98.0%
Church of the Brethren Evangelical Protestant -4 -979 -22.0%
Church of the Nazarene Evangelical Protestant -3 -3,285 -23.0%
Churches of Christ Evangelical Protestant 0 -670 -14.0%
Churches of God, General Conference Evangelical Protestant +7 +451 n.a.
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant +5 +563 n.a.
Conservative Baptist Association of America Evangelical Protestant -4 +111 4.0%
Conservative Congregational Christian Conference Evangelical Protestant +3 +324 56.0%
Cumberland Presbyterian Church Evangelical Protestant +1 +134 n.a.
Episcopal Church Mainline Protestant -3 -5,103 -29.0%
Evangelical Covenant Church, The Evangelical Protestant +1 -267 -9.0%
Evangelical Free Church of America, The Evangelical Protestant +42 +9,150 232.0%
Evangelical Lutheran Church in America Mainline Protestant -21 -16,152 -6.0%
Evangelical Presbyterian Church Evangelical Protestant +1 +426 n.a.
Free Methodist Church of North America Evangelical Protestant -5 -2,428 -77.0%
Friends (Quakers) Mainline Protestant +13 -1,787 -28.0%
Greek Orthodox Archdiocese of America Orthodox +6 +1,758 n.a.
Independent, Charismatic Churches Evangelical Protestant +6 +5,000 n.a.
Independent, Non-Charismatic Churches Evangelical Protestant +13 +11,110 n.a.
International Church of the Foursquare Gospel Evangelical Protestant +8 +2,136 85.0%
Jewish Estimate Other Theology +3 +3,878 154.0%
Lutheran Church--Missouri Synod Evangelical Protestant +10 -8,169 -6.0%
Missionary Church, The Evangelical Protestant -3 +79 25.0%
National Association of Congregational Christian Churches Mainline Protestant +2 -1,594 -42.0%
National Association of Free Will Baptists Evangelical Protestant +2 0 n.a.
Netherlands Reformed Congregations Evangelical Protestant +2 +1,585 n.a.
North American Baptist Conference Evangelical Protestant 0 -903 -28.0%
Old Order Amish Church Evangelical Protestant +19 -382 -13.0%
Old Order River Brethren Evangelical Protestant +1 +63 n.a.
Orthodox Presbyterian Church, The Evangelical Protestant +2 +85 139.0%
Pentecostal Church of God Evangelical Protestant +6 +714 n.a.
Presbyterian Church (U.S.A.) Mainline Protestant -19 -35,112 -33.0%
Presbyterian Church in America Evangelical Protestant +7 +1,067 1404.0%
Primitive Methodist Church in the USA Evangelical Protestant 0 +8 7.0%
Protestant Reformed Churches in America Evangelical Protestant 0 +245 45.0%
Reformed Church in America Mainline Protestant +5 +3,810 12.0%
Reformed Church in the United States Evangelical Protestant +1 +157 n.a.
Salvation Army, The Evangelical Protestant +1 -6,350 -41.0%
Seventh-day Adventist Church Evangelical Protestant -8 -1,033 -19.0%
Southern Baptist Convention Evangelical Protestant +21 +2,826 27.0%
Unitarian Universalist Association of Congregations Other Theology +2 +168 10.0%
United Church of Christ Mainline Protestant -18 -11,842 -19.0%
United Methodist Church, The Mainline Protestant -49 -68,092 -22.0%
Universal Fellowship of Metropolitan Community Churches Mainline Protestant 0 +22 18.0%
Wesleyan Church, The Evangelical Protestant +28 +5,952 n.a.
Wisconsin Evangelical Lutheran Synod Evangelical Protestant +2 +274 18.0%
  Totals: 37 +-83,891 -4.8%

The population of these 99 counties (or equivalents) in 1980 was 2,913,808; in 2000 it was 2,926,324. The total population changed 5.4%. The adherent totals for 1980 (1,771,042) represent 60.8% of the 1980 population. The adherent totals for 2000 (1,711,426) include 58.5% of the 2000 population. There is sufficient data for 64 groups to calculate 1980-2000 change. These 64 groups had 1,758,078 adherents in 1980 and 1,674,187 adherents in 2000, for a change of -4.8%

Sources

The 2000 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and includes statistics for 149 religious groups, including number of churches and adherents. Dale E. Jones, Sherri Doty, Clifford Grammich, James E. Horsch, Richard Houseal, Mac Lynn, John P. Marcum, Kenneth M. Sanchagrin and Richard H. Taylor supervised the collection. These data originally appeared in Religious Congregations & Membership in the United States, 2000, published by the Glenmary Research Center.

The 1980 data were collected by the Glenmary Research Center and include statistics for 111 Judeo-Christian church bodies, including number of churches and adherents. Bernard Quinn, Herman Anderson, Martin Bradley, Paul Goetting and Peggy Shriver supervised the collection. These data originally appeared in Churches and Church Membership in the United States, 1980, published by the Glenmary Research Center.

[More information on these data sources]