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Union County, Iowa - County Membership Report (2020)

Exact definitions of "congregations" and "adherents" vary by religious body. Congregations may be parishes, churches, synagogues, mosques, temples, or another site where a religious body has regularly scheduled worship services. Adherents generally are members, children who are not members, and others who are not members but are considered participants in the congregation.

[More information on the data sources]

Religious Bodies Tradition Family Congregations Adherents Adherence Rate
Catholic Church Catholic Catholic Liturgical Family 2 1,370 112.87
United Methodist Church Mainline Protestant Methodist Family 6 697 57.42
Southern Baptist Convention Evangelical Protestant Baptist Family 1 363 29.91
United Church of Christ Mainline Protestant Congregationalists (United Church of Christ) Family 2 328 27.02
Lutheran Church-Missouri Synod (LCMS) Evangelical Protestant Lutheran Family 1 288 23.73
Non-denominational Christian Churches Evangelical Protestant Other Groups Family 1 260 21.42
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian/Reformed Family 2 180 14.83
Jehovah's Witnesses Jehovah's Witnesses Adventist Family 1 176 14.50
Amish Groups, undifferentiated Evangelical Protestant Mennonite/Amish Family 2 172 14.17
Tampico Amish Mennonite Evangelical Protestant Mennonite/Amish Family 1 145 11.95
Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 1 143 11.78
Assemblies of God, General Council of the Evangelical Protestant Pentecostal Family 1 44 3.62
American Baptist Churches in the U.S.A. Mainline Protestant Baptist Family 1 36 2.97
Church of God (Anderson, Indiana) Evangelical Protestant Holiness Family 1 30 2.47
Christian Churches and Churches of Christ Evangelical Protestant Restorationists Family 1 16 1.32
Baha'i Faith Other Other Groups Family 0 1 0.08
Christian Church (Disciples of Christ) Mainline Protestant Restorationists Family 1 0 0.00
Community of Christ Evangelical Protestant Latter-day Saints (Mormonism) Family 1
General Association of Regular Baptist Churches Evangelical Protestant Baptist Family 1
United Pentecostal Church International Evangelical Protestant Pentecostal Family 1

Religious Traditions (1980 - 2020), Percent of Population

The population of this county was 12,138 in 2020. The adherent totals of the religious groups listed above (4,249) included 35.0% of the total population in 2020. The adherence rate is the number of adherents of a given group per 1,000 people in the general population.

Note that data collection methods for religious bodies change over time, affecting the comparability of statistics. For further information, see the U.S. Religion Census website at

The 2020 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include data for 372 religious bodies or groups. Of these, the ASARB was able to gather data on congregations and adherents for 217 and on congregations only for 155.

[More information on the data sources]

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