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Clinton County (Iowa)

Religious Traditions, 2010

5,187 122 10,135 9,340 1,061 23,271
Evangelical Protestant Black Protestant Mainline Protestant 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]


Religious Bodies Tradition Family Congregations Adherents Adherence Rate
African Methodist Episcopal Church Black Protestant Methodist/Pietist 1 122 2.48
American Baptist Churches in the USA Mainline Protestant Baptist 2 318 6.47
Assemblies of God Evangelical Protestant Pentecostal 2 128 2.61
Association of Free Lutheran Congregations Evangelical Protestant Lutheran 1 --- ---
Bahá'í Other Other Groups 0 17 0.35
Catholic Church Catholic Catholicism 11 9,340 190.16
Christian Churches and Churches of Christ Evangelical Protestant Baptist 1 176 3.58
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 1 20 0.41
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 2 606 12.34
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran 1 176 3.58
Church of the Nazarene Evangelical Protestant Holiness 1 0 0.00
Community of Christ Other Latter-day Saints 1 119 2.42
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 1 134 2.73
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 2 425 8.65
Evangelical Lutheran Church in America Mainline Protestant Lutheran 12 4,840 98.54
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 1 809 16.47
Jehovah's Witnesses Other Adventist 2 --- ---
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 5 2,570 52.33
Muslim Estimate Other Other Groups 1 308 6.27
National Spiritualist Association of Churches Other Spiritualist 2 --- ---
Non-denominational Evangelical Protestant
5 514 10.47
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 2 416 8.47
Reformed Church in America Mainline Protestant Presbyterian-Reformed 1 177 3.60
Seventh-day Adventist Church Evangelical Protestant Adventist 1 38 0.77
Southern Baptist Convention Evangelical Protestant Baptist 3 331 6.74
Unitarian Universalist Association of Congregations Other Liberal 1 11 0.22
United Church of Christ Mainline Protestant Presbyterian-Reformed 5 1,354 27.57
United Methodist Church, The Mainline Protestant Methodist/Pietist 10 2,896 58.96
Unity Churches, Association of Other Other Groups 1 --- ---
Totals: 79 25,845  

The population of Clinton County, Iowa was 49,116 in 2010; in 2000 it was 50,149. The total population changed -2.1%. The adherent totals of the religious groups listed above (25,845) included 52.6% 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 for those who are interested in these trends.


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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