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
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 1 269 0.1
Catholic Church Catholic Catholicism 589 539,482 185.7
Advent Christian Church Evangelical Protestant Adventist 2 116 0.0
Amana Church Society Evangelical Protestant Communal 7 789 0.3
American Baptist Association, The Evangelical Protestant Baptist 1 50 0.0
Assemblies of God Evangelical Protestant Pentecostal 121 24,743 8.5
Association of Free Lutheran Congregations Evangelical Protestant Lutheran 1 203 0.1
Beachy Amish Mennonite Churches* Evangelical Protestant European Free-Church 2 217 0.1
Brethren Church, The (Ashland, Ohio) Evangelical Protestant European Free-Church 2 280 0.1
Brethren In Christ Church Evangelical Protestant European Free-Church 2 172 0.1
Christian and Missionary Alliance, The Evangelical Protestant Holiness 17 2,349 0.8
Christian Brethren Evangelical Protestant Ind. Fundamentalist 43 2,645 0.9
Christian Churches and Churches of Christ Evangelical Protestant Baptist 136 23,432 8.1
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 60 21,360 7.4
Christian Union Evangelical Protestant Other Groups 8 682 0.2
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 14 1,674 0.6
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 20 892 0.3
Church of God (Seventh Day) Evangelical Protestant Adventist 2 50 0.0
Church of God General Conference Evangelical Protestant Adventist 5 165 0.1
Church of the Brethren Evangelical Protestant European Free-Church 32 4,435 1.5
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran 7 550 0.2
Church of the Nazarene Evangelical Protestant Holiness 80 14,444 5.0
Churches of Christ Evangelical Protestant Baptist 75 4,996 1.7
Conservative Baptist Association of America Evangelical Protestant Baptist 19 2,635 0.9
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian-Reformed 3 783 0.3
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 31 5,665 2.0
Cumberland Presbyterian Church Evangelical Protestant Presbyterian-Reformed 1 189 0.1
Evangelical Church, The Evangelical Protestant Holiness 5 254 0.1
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 19 3,193 1.1
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 38 3,965 1.4
Evangelical Lutheran Synod Evangelical Protestant Lutheran 19 2,236 0.8
Evangelical Methodist Church Evangelical Protestant Methodist/Pietist 1 20 0.0
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 21 2,518 0.9
Free Methodist Church of North America Evangelical Protestant Holiness 28 3,444 1.2
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 285 128,244 44.2
Mennonite Church Evangelical Protestant European Free-Church 25 3,991 1.4
Mennonite Church, The General Conference Evangelical Protestant European Free-Church 5 871 0.3
Missionary Church, The Evangelical Protestant Holiness 7 313 0.1
North American Baptist Conference Evangelical Protestant Baptist 14 3,207 1.1
Old Order Amish Evangelical Protestant European Free-Church 19 2,983 1.0
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 40 7,336 2.5
Orthodox Presbyterian Church, The Evangelical Protestant Presbyterian-Reformed 1 61 0.0
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 1 76 0.0
Primitive Methodist Church in the USA Evangelical Protestant Methodist/Pietist 2 113 0.0
Protestant Reformed Churches in America Evangelical Protestant Presbyterian-Reformed 3 543 0.2
Reformed Presbyterian Church of North America Evangelical Protestant Presbyterian-Reformed 5 374 0.1
Salvation Army Evangelical Protestant Holiness 19 15,762 5.4
Seventh-day Adventist Church Evangelical Protestant Adventist 65 5,679 2.0
Southern Baptist Convention Evangelical Protestant Baptist 55 10,564 3.6
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 12 1,566 0.5
American Baptist Churches in the USA Mainline Protestant Baptist 135 35,648 12.3
Christian Church (Disciples of Christ) Mainline Protestant Baptist 173 54,611 18.8
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 70 17,905 6.2
Evangelical Lutheran Church in America Mainline Protestant Lutheran 532 284,791 98.0
Friends (Quakers) Mainline Protestant European Free-Church 50 6,566 2.3
Grace Brethren Churches, Fellowship of Mainline Protestant European Free-Church 9 1,300 0.4
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran 1 114 0.0
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 3 200 0.1
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 10 3,771 1.3
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 326 105,143 36.2
Reformed Church in America Mainline Protestant Presbyterian-Reformed 73 32,899 11.3
United Church of Christ Mainline Protestant Presbyterian-Reformed 217 61,585 21.2
United Methodist Church, The Mainline Protestant Methodist/Pietist 911 316,303 108.9
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 30 8,088 2.8
Jewish Other Judaism 14 2,540 0.9
Unitarian Universalist Association of Congregations Other Liberal 10 1,660 0.6
Totals: 4,534 1,783,704  

The population of Iowa was 2,904,733 in 1980. The adherent totals of the religious groups listed above (1,783,704) included 61.4% of the total population in 1980.

* 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.