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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
Advent Christian Church Evangelical Protestant Adventist 2 113 0.0
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 1 269 0.1
American Association of Lutheran Churches Evangelical Protestant Lutheran 9 1,810 0.7
American Baptist Churches in the USA Mainline Protestant Baptist 124 32,175 11.6
Apostolic Christian Church of America, Inc. Evangelical Protestant European Free-Church 8 1,443 0.5
Armenian Apostolic Church of America (Catholicosate of Cilicia) Orthodox Eastern Liturgical (Orthodox) --- --- ---
Assemblies of God Evangelical Protestant Pentecostal 131 21,650 7.8
Association of Free Lutheran Congregations Evangelical Protestant Lutheran 4 559 0.2
Beachy Amish Mennonite Churches* Evangelical Protestant European Free-Church 2 243 0.1
Black Baptists Estimate Evangelical Protestant Baptist --- 14,188 5.1
Brethren Church, The (Ashland, Ohio) Evangelical Protestant European Free-Church 1 223 0.1
Brethren In Christ Church Evangelical Protestant European Free-Church 2 68 0.0
Catholic Church Catholic Catholicism 564 520,322 187.4
Christian and Missionary Alliance, The Evangelical Protestant Holiness 28 3,871 1.4
Christian Brethren Evangelical Protestant Ind. Fundamentalist 37 2,968 1.1
Christian Church (Disciples of Christ) Mainline Protestant Baptist 167 50,771 18.3
Christian Churches and Churches of Christ Evangelical Protestant Baptist 123 24,137 8.7
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 62 21,129 7.6
Church of Christ, Scientist Other Christian Science 24 --- ---
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 11 670 0.2
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 16 1,335 0.5
Church of God (Seventh Day) Evangelical Protestant Adventist 1 73 0.0
Church of God General Conference Evangelical Protestant Adventist 4 102 0.0
Church of God in Christ, Mennonite Evangelical Protestant European Free-Church --- --- ---
Church of God of Prophecy Evangelical Protestant Pentecostal 12 328 0.1
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 37 10,383 3.7
Church of the Brethren Evangelical Protestant European Free-Church 31 3,599 1.3
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran 6 483 0.2
Church of the Nazarene Evangelical Protestant Holiness 72 12,934 4.7
Church of the United Brethren in Christ Evangelical Protestant Methodist/Pietist 4 82 0.0
Churches of Christ Evangelical Protestant Baptist 73 4,006 1.4
Churches of God, General Conference Evangelical Protestant Presbyterian-Reformed 10 658 0.2
Congregational Christian Churches, Additional (not part of any national CCC body) Mainline Protestant Presbyterian-Reformed 8 530 0.2
Conservative Baptist Association of America Evangelical Protestant Baptist 17 --- ---
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed 2 547 0.2
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 34 6,005 2.2
Cumberland Presbyterian Church Evangelical Protestant Presbyterian-Reformed 1 124 0.0
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 67 14,198 5.1
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 51 8,056 2.9
Evangelical Lutheran Church in America Mainline Protestant Lutheran 519 265,423 95.6
Evangelical Lutheran Synod Evangelical Protestant Lutheran 19 1,795 0.6
Evangelical Methodist Church Evangelical Protestant Methodist/Pietist 1 10 0.0
Evangelical Presbyterian Church Evangelical Protestant Presbyterian-Reformed 1 209 0.1
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 28 3,262 1.2
Free Methodist Church of North America Evangelical Protestant Holiness 21 1,073 0.4
Friends (Quakers) Mainline Protestant European Free-Church 51 6,235 2.2
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 6 --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 17 --- ---
Independent, Charismatic Churches Evangelical Protestant Pentecostal 4 5,520 2.0
Independent, Non-Charismatic Churches Evangelical Protestant
----
14 7,525 2.7
International Pentecostal Holiness Church Evangelical Protestant Pentecostal --- --- ---
Jewish Other Judaism 20 6,701 2.4
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran 1 75 0.0
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 293 124,021 44.7
Mennonite Church USA Evangelical Protestant European Free-Church 33 5,304 1.9
Missionary Church, The Evangelical Protestant Holiness 7 376 0.1
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 12 2,473 0.9
National Association of Free Will Baptists Evangelical Protestant Baptist 1 102 0.0
Netherlands Reformed Congregations Evangelical Protestant Presbyterian-Reformed 2 1,525 0.5
North American Baptist Conference Evangelical Protestant Baptist 14 2,782 1.0
Old Order Amish Evangelical Protestant European Free-Church 23 3,450 1.2
Old Order River Brethren Evangelical Protestant European Free-Church 1 64 0.0
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 47 --- ---
Pentecostal Church of God Evangelical Protestant Pentecostal 6 478 0.2
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 311 85,186 30.7
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 6 768 0.3
Primitive Methodist Church in the USA Evangelical Protestant Methodist/Pietist 2 24 0.0
Reformed Church in America Mainline Protestant Presbyterian-Reformed 74 33,337 12.0
Reformed Church in the United States Evangelical Protestant Presbyterian-Reformed 1 196 0.1
Salvation Army Evangelical Protestant Holiness 21 2,794 1.0
Seventh-day Adventist Church Evangelical Protestant Adventist 55 5,426 2.0
Southern Baptist Convention Evangelical Protestant Baptist 60 13,960 5.0
Unitarian Universalist Association of Congregations Other Liberal 11 2,157 0.8
United Church of Christ Mainline Protestant Presbyterian-Reformed 209 59,450 21.4
United Methodist Church, The Mainline Protestant Methodist/Pietist 887 272,098 98.0
Wesleyan Church, The Evangelical Protestant Holiness 25 5,615 2.0
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 11 1,596 0.6
Totals: 4,560 1,681,062  

The population of Iowa was 2,776,755 in 1990; in 1980 it was 2,904,733. The total population changed -4.4%. The adherent totals of the religious groups listed above (1,681,062) included 60.5% of the total population in 1990.

* 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.