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Mercer County, Ohio - 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 22 22,244 523.04
Non-denominational Christian Churches Evangelical Protestant Other Groups Family 9 4,430 104.17
United Methodist Church Mainline Protestant Methodist Family 12 1,989 46.77
Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 4 1,450 34.10
Churches of God, General Conference Evangelical Protestant Presbyterian/Reformed Family 4 652 15.33
National Missionary Baptist Convention of America Black Protestant Baptist Family 2 450 10.58
Church of the United Brethren in Christ, USA Evangelical Protestant Methodist Family 1 324 7.62
Church of the Nazarene Evangelical Protestant Holiness Family 2 323 7.59
United Church of Christ Mainline Protestant Congregationalists (United Church of Christ) Family 1 293 6.89
Amish Groups, undifferentiated Evangelical Protestant Mennonite/Amish Family 7 153 3.60
Christian Churches and Churches of Christ Evangelical Protestant Restorationists Family 1 126 2.96
Jehovah's Witnesses Jehovah's Witnesses Adventist Family 1 116 2.73
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal Family 1 106 2.49
Missionary Church, The Evangelical Protestant Holiness Family 1 106 2.49
Southern Baptist Convention Evangelical Protestant Baptist Family 1 94 2.21
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian/Reformed Family 1 78 1.83
Church of the Brethren Evangelical Protestant Friends/Brethren Family 1 40 0.94
Baha'i Faith Other Other Groups Family 0 10 0.24
Friends United Meeting Mainline Protestant Friends/Brethren Family 1 3 0.07
North American Lutheran Church Evangelical Protestant Lutheran Family 2
United Pentecostal Church International Evangelical Protestant Pentecostal Family 2

Religious Traditions (1980 - 2020), Percent of Population

The population of this county was 42,528 in 2020. The adherent totals of the religious groups listed above (32,987) included 77.6% 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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