County Membership Report
 Maps and Reports > Select Counties >
Search Maps & Reports:

Linn County (Iowa)

Religious Traditions, 2010

29,184 433 35,522 40,930 545 4,969 99,643
Evangelical Protestant Black Protestant Mainline Protestant Catholic Orthodox 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
United Methodist Church, The Mainline Protestant Methodist/Pietist 27 13,170 78.04
Catholic Church Catholic Catholicism 19 38,980 230.97
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 15 6,440 38.16
Evangelical Lutheran Church in America Mainline Protestant Lutheran 13 10,051 59.56
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 9 6,335 37.54
Christian Church (Disciples of Christ) Mainline Protestant Baptist 7 3,010 17.84
American Baptist Churches in the USA Mainline Protestant Baptist 4 1,133 6.71
Independent, Non-Charismatic Churches Evangelical Protestant
4 1,750 10.37
United Church of Christ Mainline Protestant Presbyterian-Reformed 4 1,835 10.87
Christian Churches and Churches of Christ Evangelical Protestant Baptist 3 474 2.81
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 3 930 5.51
Church of the Nazarene Evangelical Protestant Holiness 3 1,226 7.26
Churches of Christ Evangelical Protestant Baptist 3 279 1.65
Conservative Baptist Association of America Evangelical Protestant Baptist 3 --- ---
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 3 942 5.58
Free Methodist Church of North America Evangelical Protestant Holiness 3 179 1.06
Assemblies of God Evangelical Protestant Pentecostal 2 1,480 8.77
Christian Brethren Evangelical Protestant Ind. Fundamentalist 2 95 0.56
Church of the Brethren Evangelical Protestant European Free-Church 2 112 0.66
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 2 337 2.00
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 2 443 2.62
Friends (Quakers) Mainline Protestant European Free-Church 2 126 0.75
Jewish Other Judaism 2 430 2.55
Seventh-day Adventist Church Evangelical Protestant Adventist 2 507 3.00
Wesleyan Church, The Evangelical Protestant Holiness 2 611 3.62
Christian and Missionary Alliance, The Evangelical Protestant Holiness 1 91 0.54
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 1 171 1.01
Church of Christ, Scientist Other Christian Science 1 --- ---
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 1 110 0.65
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 1 62 0.37
Church of God (Seventh Day) Evangelical Protestant Adventist 1 73 0.43
Church of God of Prophecy Evangelical Protestant Pentecostal 1 27 0.16
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 1 190 1.13
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 1 --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 1 --- ---
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 1 96 0.57
North American Baptist Conference Evangelical Protestant Baptist 1 65 0.39
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 1 --- ---
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 1 54 0.32
Reformed Church in America Mainline Protestant Presbyterian-Reformed 1 325 1.93
Salvation Army Evangelical Protestant Holiness 1 155 0.92
Southern Baptist Convention Evangelical Protestant Baptist 1 996 5.90
Unitarian Universalist Association of Congregations Other Liberal 1 361 2.14
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 1 316 1.87
Black Baptists Estimate Evangelical Protestant Baptist --- 1,099 6.51
Totals: 160 95,066  

The population of Linn County, Iowa was 168,767 in 1990; in 1980 it was 169,775. The total population changed -0.6%. The adherent totals of the religious groups listed above (95,066) included 56.3% 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 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.

Bookmark and Share