State Membership Report
Religious Traditions, 2010
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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 |
887 |
272,098 |
97.99 |
Catholic Church |
Catholic |
Catholicism |
564 |
520,322 |
187.38 |
Evangelical Lutheran Church in America |
Mainline Protestant |
Lutheran |
519 |
265,423 |
95.59 |
Presbyterian Church (U.S.A.) |
Mainline Protestant |
Presbyterian-Reformed |
311 |
85,186 |
30.68 |
Lutheran Church--Missouri Synod |
Evangelical Protestant |
Lutheran |
293 |
124,021 |
44.66 |
United Church of Christ |
Mainline Protestant |
Presbyterian-Reformed |
209 |
59,450 |
21.41 |
Christian Church (Disciples of Christ) |
Mainline Protestant |
Baptist |
167 |
50,771 |
18.28 |
Assemblies of God |
Evangelical Protestant |
Pentecostal |
131 |
21,650 |
7.80 |
American Baptist Churches in the USA |
Mainline Protestant |
Baptist |
124 |
32,175 |
11.59 |
Christian Churches and Churches of Christ |
Evangelical Protestant |
Baptist |
123 |
24,137 |
8.69 |
Reformed Church in America |
Mainline Protestant |
Presbyterian-Reformed |
74 |
33,337 |
12.01 |
Churches of Christ |
Evangelical Protestant |
Baptist |
73 |
4,006 |
1.44 |
Church of the Nazarene |
Evangelical Protestant |
Holiness |
72 |
12,934 |
4.66 |
Episcopal Church |
Mainline Protestant |
Episcopalianism/Anglicanism |
67 |
14,198 |
5.11 |
Christian Reformed Church in North America |
Evangelical Protestant |
Presbyterian-Reformed |
62 |
21,129 |
7.61 |
Southern Baptist Convention |
Evangelical Protestant |
Baptist |
60 |
13,960 |
5.03 |
Seventh-day Adventist Church |
Evangelical Protestant |
Adventist |
55 |
5,426 |
1.95 |
Evangelical Free Church of America, The |
Evangelical Protestant |
Methodist/Pietist |
51 |
8,056 |
2.90 |
Friends (Quakers) |
Mainline Protestant |
European Free-Church |
51 |
6,235 |
2.25 |
Open Bible Standard Churches, Inc. |
Evangelical Protestant |
Pentecostal |
47 |
--- |
--- |
Christian Brethren |
Evangelical Protestant |
Ind. Fundamentalist |
37 |
2,968 |
1.07 |
Church of Jesus Christ of Latter-day Saints, The |
Other |
Latter-day Saints |
37 |
10,383 |
3.74 |
Converge Worldwide/Baptist General Conference |
Evangelical Protestant |
Baptist |
34 |
6,005 |
2.16 |
Mennonite Church USA |
Evangelical Protestant |
European Free-Church |
33 |
5,304 |
1.91 |
Church of the Brethren |
Evangelical Protestant |
European Free-Church |
31 |
3,599 |
1.30 |
Christian and Missionary Alliance, The |
Evangelical Protestant |
Holiness |
28 |
3,871 |
1.39 |
Foursquare Gospel, International Church of the |
Evangelical Protestant |
Pentecostal |
28 |
3,262 |
1.17 |
Wesleyan Church, The |
Evangelical Protestant |
Holiness |
25 |
5,615 |
2.02 |
Church of Christ, Scientist |
Other |
Christian Science |
24 |
--- |
--- |
Old Order Amish |
Evangelical Protestant |
European Free-Church |
23 |
3,450 |
1.24 |
Free Methodist Church of North America |
Evangelical Protestant |
Holiness |
21 |
1,073 |
0.39 |
Salvation Army |
Evangelical Protestant |
Holiness |
21 |
2,794 |
1.01 |
Jewish |
Other |
Judaism |
20 |
6,701 |
2.41 |
Evangelical Lutheran Synod |
Evangelical Protestant |
Lutheran |
19 |
1,795 |
0.65 |
Conservative Baptist Association of America |
Evangelical Protestant |
Baptist |
17 |
--- |
--- |
Independent Fundamental Churches of America |
Evangelical Protestant |
Ind. Fundamentalist |
17 |
--- |
--- |
Church of God (Cleveland, Tennessee) |
Evangelical Protestant |
Pentecostal |
16 |
1,335 |
0.48 |
Independent, Non-Charismatic Churches |
Evangelical Protestant |
---- |
14 |
7,525 |
2.71 |
North American Baptist Conference |
Evangelical Protestant |
Baptist |
14 |
2,782 |
1.00 |
Church of God of Prophecy |
Evangelical Protestant |
Pentecostal |
12 |
328 |
0.12 |
National Association of Congregational Christian Churches |
Mainline Protestant |
Presbyterian-Reformed |
12 |
2,473 |
0.89 |
Church of God (Anderson, Indiana) |
Evangelical Protestant |
Holiness |
11 |
670 |
0.24 |
Unitarian Universalist Association of Congregations |
Other |
Liberal |
11 |
2,157 |
0.78 |
Wisconsin Evangelical Lutheran Synod |
Evangelical Protestant |
Lutheran |
11 |
1,596 |
0.57 |
Churches of God, General Conference |
Evangelical Protestant |
Presbyterian-Reformed |
10 |
658 |
0.24 |
American Association of Lutheran Churches |
Evangelical Protestant |
Lutheran |
9 |
1,810 |
0.65 |
Apostolic Christian Church of America, Inc. |
Evangelical Protestant |
European Free-Church |
8 |
1,443 |
0.52 |
Congregational Christian Churches, Additional (not part of any national CCC body) |
Mainline Protestant |
Presbyterian-Reformed |
8 |
530 |
0.19 |
Missionary Church, The |
Evangelical Protestant |
Holiness |
7 |
376 |
0.14 |
Church of the Lutheran Brethren of America |
Evangelical Protestant |
Lutheran |
6 |
483 |
0.17 |
Greek Orthodox Archdiocese of America |
Orthodox |
Eastern Liturgical (Orthodox) |
6 |
--- |
--- |
Pentecostal Church of God |
Evangelical Protestant |
Pentecostal |
6 |
478 |
0.17 |
Presbyterian Church in America |
Evangelical Protestant |
Presbyterian-Reformed |
6 |
768 |
0.28 |
Association of Free Lutheran Congregations |
Evangelical Protestant |
Lutheran |
4 |
559 |
0.20 |
Church of God General Conference |
Evangelical Protestant |
Adventist |
4 |
102 |
0.04 |
Church of the United Brethren in Christ |
Evangelical Protestant |
Methodist/Pietist |
4 |
82 |
0.03 |
Independent, Charismatic Churches |
Evangelical Protestant |
Pentecostal |
4 |
5,520 |
1.99 |
Advent Christian Church |
Evangelical Protestant |
Adventist |
2 |
113 |
0.04 |
Beachy Amish Mennonite Churches* |
Evangelical Protestant |
European Free-Church |
2 |
243 |
0.09 |
Brethren In Christ Church |
Evangelical Protestant |
European Free-Church |
2 |
68 |
0.02 |
Conservative Congregational Christian Conference |
Evangelical Protestant |
Presbyterian-Reformed |
2 |
547 |
0.20 |
Netherlands Reformed Congregations |
Evangelical Protestant |
Presbyterian-Reformed |
2 |
1,525 |
0.55 |
Primitive Methodist Church in the USA |
Evangelical Protestant |
Methodist/Pietist |
2 |
24 |
0.01 |
African Methodist Episcopal Zion Church |
Black Protestant |
Methodist/Pietist |
1 |
269 |
0.10 |
Brethren Church, The (Ashland, Ohio) |
Evangelical Protestant |
European Free-Church |
1 |
223 |
0.08 |
Church of God (Seventh Day) |
Evangelical Protestant |
Adventist |
1 |
73 |
0.03 |
Cumberland Presbyterian Church |
Evangelical Protestant |
Presbyterian-Reformed |
1 |
124 |
0.04 |
Evangelical Methodist Church |
Evangelical Protestant |
Methodist/Pietist |
1 |
10 |
0.00 |
Evangelical Presbyterian Church |
Evangelical Protestant |
Presbyterian-Reformed |
1 |
209 |
0.08 |
Latvian Evangelical Lutheran Church in America |
Mainline Protestant |
Lutheran |
1 |
75 |
0.03 |
National Association of Free Will Baptists |
Evangelical Protestant |
Baptist |
1 |
102 |
0.04 |
Old Order River Brethren |
Evangelical Protestant |
European Free-Church |
1 |
64 |
0.02 |
Reformed Church in the United States |
Evangelical Protestant |
Presbyterian-Reformed |
1 |
196 |
0.07 |
Black Baptists Estimate |
Evangelical Protestant |
Baptist |
--- |
14,188 |
5.11 |
| | 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.
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