Iowa

Denominational Groups, 2000

346,243	775,045	2,865	558,092	29,181	1,214,898
Evangelical Protestant	Mainline Protestant	Orthodox	Catholic	Other	Unclaimed

Congregational "adherents" include all full members, their children, and others who regularly attend services. The historically African American denominations are not included in the 2000 congregation and membership totals. Many are also missing in 1990 and most historically African American denominations are missing in the 1980 reports.
[More information on the data sources]

Reports

Religious Bodies	Theology	Congregations	Adherents	Adherence Rate^†
Catholic Church	Catholic	564	520,322	187.4
United Methodist Church, The	Mainline Protestant	887	272,098	98.0
Evangelical Lutheran Church in America	Mainline Protestant	519	265,423	95.6
Lutheran Church--Missouri Synod	Evangelical Protestant	293	124,021	44.7
Presbyterian Church (U.S.A.)	Mainline Protestant	311	85,186	30.7
United Church of Christ	Mainline Protestant	209	59,450	21.4
Christian Church (Disciples of Christ)	Mainline Protestant	167	50,771	18.3
Reformed Church in America	Mainline Protestant	74	33,337	12.0
American Baptist Churches in the USA	Mainline Protestant	124	32,175	11.6
Christian Churches and Churches of Christ	Evangelical Protestant	123	24,137	8.7
Assemblies of God	Evangelical Protestant	131	21,650	7.8
Christian Reformed Church in North America	Evangelical Protestant	62	21,129	7.6
Episcopal Church	Mainline Protestant	67	14,198	5.1
Black Baptists Estimate	Evangelical Protestant	n.a.	14,188	5.1
Southern Baptist Convention	Evangelical Protestant	60	13,960	5.0
Church of the Nazarene	Evangelical Protestant	72	12,934	4.7
Church of Jesus Christ of Latter-day Saints, The	Other Theology	37	10,383	3.7
Evangelical Free Church of America, The	Evangelical Protestant	51	8,056	2.9
Independent, Non-Charismatic Churches	Evangelical Protestant	14	7,525	2.7
Jewish Estimate	Other Theology	20	6,701	2.4
Friends (Quakers)	Mainline Protestant	51	6,235	2.3
Baptist General Conference	Evangelical Protestant	34	6,005	2.2
Wesleyan Church, The	Evangelical Protestant	25	5,615	2.0
Independent, Charismatic Churches	Evangelical Protestant	4	5,520	2.0
Seventh-day Adventist Church	Evangelical Protestant	55	5,426	2.0
Mennonite Church USA	Evangelical Protestant	33	5,304	1.9
Churches of Christ	Evangelical Protestant	73	4,006	1.4
Christian and Missionary Alliance, The	Evangelical Protestant	28	3,871	1.4
Church of the Brethren	Evangelical Protestant	31	3,599	1.3
Old Order Amish Church	Evangelical Protestant	23	3,450	1.2
International Church of the Foursquare Gospel	Evangelical Protestant	28	3,262	1.2
Christian Brethren	Evangelical Protestant	37	2,968	1.1
Salvation Army, The	Evangelical Protestant	21	2,794	1.0
North American Baptist Conference	Evangelical Protestant	14	2,782	1.0
National Association of Congregational Christian Churches	Mainline Protestant	12	2,473	0.9
Unitarian Universalist Association of Congregations	Other Theology	11	2,157	0.8
American Association of Lutheran Churches	Evangelical Protestant	9	1,810	0.7
Evangelical Lutheran Synod	Evangelical Protestant	19	1,795	0.7
Wisconsin Evangelical Lutheran Synod	Evangelical Protestant	11	1,596	0.6
Netherlands Reformed Congregations	Evangelical Protestant	2	1,525	0.6
Apostolic Christian Church of America, Inc.	Evangelical Protestant	8	1,443	0.5
Church of God (Cleveland, Tennessee)	Evangelical Protestant	16	1,335	0.5
Free Methodist Church of North America	Evangelical Protestant	21	1,073	0.4
Presbyterian Church in America	Evangelical Protestant	6	768	0.3
Churches of God, General Conference	Evangelical Protestant	10	658	0.2
Church of God (Anderson, Indiana)	Evangelical Protestant	11	670	0.2
Conservative Congregational Christian Conference	Evangelical Protestant	2	547	0.2
Association of Free Lutheran Congregations, The	Evangelical Protestant	4	559	0.2
Congregational Christian Churches, Additional (not part of any national CCC body)	Mainline Protestant	8	530	0.2
Church of the Lutheran Brethren of America	Evangelical Protestant	6	483	0.2
Pentecostal Church of God	Evangelical Protestant	6	478	0.2
Missionary Church, The	Evangelical Protestant	7	376	0.1
Church of God of Prophecy	Evangelical Protestant	12	328	0.1
African Methodist Episcopal Zion Church	Evangelical Protestant	1	269	0.1
Beachy Amish Mennonite Churches	Evangelical Protestant	2	243	0.1
Brethren Church, The (Ashland, Ohio)	Evangelical Protestant	1	223	0.1
Evangelical Presbyterian Church	Evangelical Protestant	1	209	0.1
Reformed Church in the United States	Evangelical Protestant	1	196	0.1
Advent Christian Church	Evangelical Protestant	2	113	0.0
Cumberland Presbyterian Church	Evangelical Protestant	1	124	0.0
Church of God General Conference	Evangelical Protestant	4	102	0.0
National Association of Free Will Baptists	Evangelical Protestant	1	102	0.0
Church of the United Brethren in Christ	Evangelical Protestant	4	82	0.0
Latvian Evangelical Lutheran Church in America	Mainline Protestant	1	75	0.0
Church of God (Seventh Day)	Evangelical Protestant	1	73	0.0
Old Order River Brethren	Evangelical Protestant	1	64	0.0
Brethren In Christ Church	Evangelical Protestant	2	68	0.0
Primitive Methodist Church in the USA	Evangelical Protestant	2	24	0.0
Evangelical Methodist Church	Evangelical Protestant	1	10	0.0
Open Bible Standard Churches, Inc.	Evangelical Protestant	47	n.a.	n.a.
Conservative Baptist Association of America	Evangelical Protestant	17	n.a.	n.a.
Greek Orthodox Archdiocese of America	Orthodox	6	n.a.	n.a.
Church of Christ, Scientist	Other Theology	24	n.a.	n.a.
Independent Fundamental Churches of America	Evangelical Protestant	17	n.a.	n.a.
	*Totals (Unadjusted)^:**	4,560	1,681,062

The population of these counties (or equivalents) in 1990 was 2,776,755. The adherent totals of the religious groups listed above (1,681,062) include 60.5% of the total population in 1990.

Source

The 1990 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include statistics for 132 religious groups, including number of churches and adherents. Martin B. Bradley, Norman M. Green, Jr., Dale E. Jones, Mac Lynn, and Lou McNeil supervised the collection. These data originally appeared in Churches and Church Membership in the United States, 1990, published by the Glenmary Research Center.

[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 2000 the Episcopal Church had an adherence rate of approximately 8 (8.1) in Autauga County, Alabama. This means that 8 out of every 1,000 people in Autauga county are Episcopalian.