State Membership Report
 Maps and Reports > Select State > State Report
Search Maps & Reports:

Iowa

Religious Traditions, 2010

402,376 17,902 666,637 2,232 503,080 50,117 1,404,011
Evangelical Protestant Black Protestant Mainline Protestant Orthodox Catholic 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
United Methodist Church, The Mainline Protestant Methodist/Pietist 810 235,190 77.2
Catholic Church Catholic Catholicism 454 503,080 165.1
Evangelical Lutheran Church in America Mainline Protestant Lutheran 439 229,557 75.4
Non-denominational Evangelical Protestant
----
339 74,985 24.6
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 294 105,148 34.5
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 283 51,382 16.9
United Church of Christ Mainline Protestant Presbyterian-Reformed 178 38,998 12.8
Christian Church (Disciples of Christ) Mainline Protestant Baptist 136 38,654 12.7
Assemblies of God Evangelical Protestant Pentecostal 129 27,755 9.1
Christian Churches and Churches of Christ Evangelical Protestant Baptist 122 23,591 7.7
Southern Baptist Convention Evangelical Protestant Baptist 106 16,466 5.4
American Baptist Churches in the USA Mainline Protestant Baptist 102 17,165 5.6
General Association of Regular Baptist Churches Evangelical Protestant Baptist 99 --- ---
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 89 19,945 6.5
Reformed Church in America Mainline Protestant Presbyterian-Reformed 80 40,714 13.4
Church of the Nazarene Evangelical Protestant Holiness 75 10,173 3.3
Churches of Christ Evangelical Protestant Baptist 71 4,260 1.4
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 69 24,614 8.1
Jehovah's Witnesses Other Adventist 69 --- ---
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 61 9,060 3.0
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 59 20,457 6.7
Amish Groups, undifferentiated* Evangelical Protestant European Free-Church 52 7,179 2.4
Community of Christ Other Latter-day Saints 49 7,669 2.5
Lutheran Congregations in Mission for Christ Evangelical Protestant Lutheran 48 29,089 9.5
Seventh-day Adventist Church Evangelical Protestant Adventist 46 4,598 1.5
United Pentecostal Church International Evangelical Protestant Pentecostal 46 --- ---
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 41 4,950 1.6
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 41 3,765 1.2
Friends United Meeting* Mainline Protestant European Free-Church 37 3,807 1.2
North American Lutheran Church Evangelical Protestant Lutheran 28 --- ---
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 26 3,105 1.0
Church of the Brethren Evangelical Protestant European Free-Church 25 2,536 0.8
Mennonite Church USA Evangelical Protestant European Free-Church 22 3,851 1.3
Wesleyan Church, The Evangelical Protestant Holiness 21 2,789 0.9
Christian and Missionary Alliance, The Evangelical Protestant Holiness 20 5,199 1.7
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 19 1,363 0.4
Evangelical Lutheran Synod Evangelical Protestant Lutheran 19 1,292 0.4
National Baptist Convention, USA, Inc. Black Protestant Baptist 19 13,265 4.4
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 18 1,871 0.6
Muslim Estimate Other Other Groups 18 6,528 2.1
Salvation Army Evangelical Protestant Holiness 18 5,536 1.8
Free Methodist Church of North America Evangelical Protestant Holiness 17 641 0.2
Vineyard USA Evangelical Protestant Pentecostal 16 6,111 2.0
North American Baptist Conference Evangelical Protestant Baptist 15 2,113 0.7
Conservative Baptist Association of America Evangelical Protestant Baptist 14 --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 14 --- ---
Church of Christ, Scientist Other Christian Science 13 --- ---
African Methodist Episcopal Church Black Protestant Methodist/Pietist 12 2,198 0.7
Unitarian Universalist Association of Congregations Other Liberal 12 2,349 0.8
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 11 1,419 0.5
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 11 1,338 0.4
American Association of Lutheran Churches Evangelical Protestant Lutheran 10 --- ---
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 10 1,636 0.5
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 9 287 0.1
Church of God in Christ Black Protestant Pentecostal 9 1,183 0.4
Church of God of Prophecy Evangelical Protestant Pentecostal 9 442 0.1
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed 9 1,859 0.6
Conservative Yearly Meetings of Friends* Evangelical Protestant European Free-Church 9 545 0.2
Apostolic Christian Church of America, Inc. Evangelical Protestant European Free-Church 8 1,989 0.7
Bahá'í Other Other Groups 8 1,019 0.3
Christian Brethren Evangelical Protestant Ind. Fundamentalist 8 --- ---
Churches of God, General Conference Evangelical Protestant Presbyterian-Reformed 8 355 0.1
Hindu, Post Renaissance Other Other Groups 8 346 0.1
United Reformed Churches in North America Evangelical Protestant Presbyterian-Reformed 8 --- ---
Association of Free Lutheran Congregations Evangelical Protestant Lutheran 7 --- ---
Calvary Chapel Fellowship Churches Evangelical Protestant Pentecostal 7 --- ---
Christian Union Evangelical Protestant Other Groups 7 --- ---
Independent Baptist Fellowship International Evangelical Protestant Baptist 7 --- ---
Evangelical Church, The Evangelical Protestant Holiness 6 --- ---
Grace Brethren Churches, Fellowship of Mainline Protestant European Free-Church 6 --- ---
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 6 1,180 0.4
Reform Judaism Other Judaism 6 2,506 0.8
Buddhism, Theravada Other Other Groups 5 739 0.2
Conservative Mennonite Conference Evangelical Protestant European Free-Church 5 555 0.2
Missionary Church, The Evangelical Protestant Holiness 5 342 0.1
Unity Churches, Association of Other Other Groups 5 --- ---
Buddhism, Mahayana Other Other Groups 4 561 0.2
Church of God in Christ, Mennonite Evangelical Protestant European Free-Church 4 432 0.1
International Pentecostal Holiness Church Evangelical Protestant Pentecostal 4 239 0.1
National Spiritualist Association of Churches Other Spiritualist 4 --- ---
Orthodox Judaism Other Judaism 4 510 0.2
Orthodox Presbyterian Church, The Evangelical Protestant Presbyterian-Reformed 4 153 0.1
Antiochian Orthodox Christian Archdiocese of North America, The Orthodox Eastern Liturgical (Orthodox) 3 700 0.2
Church of God General Conference Evangelical Protestant Adventist 3 79 0.0
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran 3 479 0.2
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed 3 281 0.1
Conservative Judaism Other Judaism 3 1,069 0.4
Hindu, Traditional Temples Other Other Groups 3 1,225 0.4
New Testament Association of Independent Baptist Churches Evangelical Protestant Baptist 3 --- ---
Pentecostal Church of God Evangelical Protestant Pentecostal 3 327 0.1
Protestant Reformed Churches in America Evangelical Protestant Presbyterian-Reformed 3 838 0.3
Reformed Presbyterian Church of North America Evangelical Protestant Presbyterian-Reformed 3 166 0.1
Beachy Amish Mennonite Churches* Evangelical Protestant European Free-Church 2 370 0.1
Buddhism, Vajrayana Other Other Groups 2 493 0.2
Church of God (Seventh Day) Evangelical Protestant Adventist 2 --- ---
Church of the United Brethren in Christ Evangelical Protestant Methodist/Pietist 2 17 0.0
Coptic Orthodox Church Orthodox Eastern Liturgical (Orthodox) 2 130 0.0
Evangelical Methodist Church Evangelical Protestant Methodist/Pietist 2 --- ---
Full Gospel Baptist Church Fellowship Black Protestant Baptist 2 --- ---
Hindu, Indian-American Hindu Temple Assoc. Other Other Groups 2 488 0.2
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 2 180 0.1
National Association of Free Will Baptists Evangelical Protestant Baptist 2 94 0.0
National Missionary Baptist Convention, Inc. Black Protestant Baptist 2 992 0.3
New Apostolic Church of North America, National Organization of the Other Other Groups 2 --- ---
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 2 61 0.0
Sikh Other Other Groups 2 --- ---
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 1 138 0.0
Amana Church Society Evangelical Protestant Communal 1 433 0.1
Anglican Church in North America Evangelical Protestant Episcopalianism/Anglicanism 1 --- ---
Association of Reformed Baptist Churches of America Evangelical Protestant Baptist 1 --- ---
Berea Amish Mennonite* Evangelical Protestant European Free-Church 1 110 0.0
Brethren Church, The (Ashland, Ohio) Evangelical Protestant European Free-Church 1 96 0.0
Brethren In Christ Church Evangelical Protestant European Free-Church 1 --- ---
Christian Methodist Episcopal Church Black Protestant Methodist/Pietist 1 126 0.0
Communion of Reformed Evangelical Churches Evangelical Protestant Presbyterian-Reformed 1 --- ---
Covenant Reformed Presbyterian Church Evangelical Protestant Presbyterian-Reformed 1 --- ---
Cumberland Presbyterian Church Evangelical Protestant Presbyterian-Reformed 1 27 0.0
Evangelical Presbyterian Church Evangelical Protestant Presbyterian-Reformed 1 178 0.1
Friends General Conference* Mainline Protestant European Free-Church 1 13 0.0
Grace Gospel Fellowship Evangelical Protestant Ind. Fundamentalist 1 --- ---
Heritage Reformed Churches Evangelical Protestant Presbyterian-Reformed 1 95 0.0
International Churches of Christ Evangelical Protestant Baptist 1 38 0.0
International Council of Community Churches Mainline Protestant Presbyterian-Reformed 1 --- ---
Malankara Orthodox Syrian Church Orthodox Eastern Liturgical (Orthodox) 1 21 0.0
Old Order River Brethren Evangelical Protestant European Free-Church 1 76 0.0
Presbyterian Reformed Church Evangelical Protestant Presbyterian-Reformed 1 --- ---
Reformed Baptist Churches Evangelical Protestant Baptist 1 --- ---
Reformed Church in the United States Evangelical Protestant Presbyterian-Reformed 1 127 0.0
Reformed Presbyterian Church Hanover Presbytery Evangelical Protestant Presbyterian-Reformed 1 --- ---
Serbian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 1 140 0.0
Swedenborgian Church Other Spiritualist 1 --- ---
Tampico Amish Mennonite* Evangelical Protestant European Free-Church 1 103 0.0
Unaffiliated Friends Meetings* Mainline Protestant European Free-Church 1 --- ---
United Holy Church of America, Inc. Black Protestant Pentecostal 1 --- ---
Zoroastrian Other Other Groups 0 1 0.0
Totals: 5,107 1,642,344  

The population of Iowa was 3,046,355 in 2010; in 2000 it was 2,926,324. The total population changed 4.1%. The adherent totals of the religious groups listed above (1,642,344) included 53.9% of the total population in 2010.

* 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.