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