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Mason City, IA, Micropolitan Statistical Area

Religious Traditions, 2010

7,492 19,752 7,062 200 970 16,273
Evangelical 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
Evangelical Lutheran Church in America Mainline Protestant Lutheran 22 15,568 321.27
United Methodist Church, The Mainline Protestant Methodist/Pietist 15 8,165 168.50
Catholic Church Catholic Catholicism 9 10,388 214.37
American Baptist Churches in the USA Mainline Protestant Baptist 3 647 13.35
Christian Churches and Churches of Christ Evangelical Protestant Baptist 3 395 8.15
Evangelical Lutheran Synod Evangelical Protestant Lutheran 3 398 8.21
Christian Church (Disciples of Christ) Mainline Protestant Baptist 2 846 17.46
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 2 486 10.03
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 2 1,249 25.77
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 2 570 11.76
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 2 240 4.95
Southern Baptist Convention Evangelical Protestant Baptist 2 274 5.65
Assemblies of God Evangelical Protestant Pentecostal 1 190 3.92
Christian and Missionary Alliance, The Evangelical Protestant Holiness 1 96 1.98
Christian Brethren Evangelical Protestant Ind. Fundamentalist 1 20 0.41
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 1 115 2.37
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 1 8 0.17
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 1 155 3.20
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran 1 95 1.96
Church of the Nazarene Evangelical Protestant Holiness 1 112 2.31
Churches of Christ Evangelical Protestant Baptist 1 34 0.70
Conservative Baptist Association of America Evangelical Protestant Baptist 1 36 0.74
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 1 140 2.89
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 1 118 2.44
Free Methodist Church of North America Evangelical Protestant Holiness 1 213 4.40
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 1 662 13.66
Reformed Church in America Mainline Protestant Presbyterian-Reformed 1 482 9.95
Salvation Army Evangelical Protestant Holiness 1 225 4.64
Seventh-day Adventist Church Evangelical Protestant Adventist 1 123 2.54
Unitarian Universalist Association of Congregations Other Liberal 1 16 0.33
United Church of Christ Mainline Protestant Presbyterian-Reformed 1 616 12.71
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 1 103 2.13
Church of Christ, Scientist Other Christian Science 0 0 0.00
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 0 0 0.00
Jewish Other Judaism 0 0 0.00
Wesleyan Church, The Evangelical Protestant Holiness 0 0 0.00
Totals: 87 42,785  

The population of the Mason City, IA, Micropolitan Statistical Area was 48,458 in 1980. The adherent totals of the religious groups listed above (42,785) included 88.3% 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 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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