State Membership Report
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Idaho

Denominational Groups, 2000

116,186 65,243 805 130,847 314,181 666,691
Evangelical Protestant Mainline Protestant Orthodox Catholic Other Unclaimed

Congregational "adherents" include all full members, their children, and others who regularly attend services. The historically African American denominations are not included in the 2000 congregation and membership totals. Many are also missing in 1990 and most historically African American denominations are missing in the 1980 reports.
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Reports


Religious Bodies Theology Congregations Adherents % Change
American Baptist Association, The Evangelical Protestant +5 +75 38.0%
American Baptist Churches in the USA Mainline Protestant -1 -2,298 -24.0%
Assemblies of God Evangelical Protestant +11 +5,666 43.0%
Baptist General Conference Evangelical Protestant -1 -117 -36.0%
Catholic Church Catholic -4 +60,371 86.0%
Christian and Missionary Alliance, The Evangelical Protestant +2 +344 86.0%
Christian Church (Disciples of Christ) Mainline Protestant -2 -2,647 -40.0%
Christian Churches and Churches of Christ Evangelical Protestant +5 +1,902 32.0%
Christian Reformed Church in North America Evangelical Protestant -1 -110 -58.0%
Church of God (Anderson, Indiana) Evangelical Protestant 0 -1,028 -55.0%
Church of God (Cleveland, Tennessee) Evangelical Protestant -7 +139 18.0%
Church of God in Christ, Mennonite Evangelical Protestant +3 +467 132.0%
Church of God of Prophecy Evangelical Protestant +9 +303 n.a.
Church of Jesus Christ of Latter-day Saints, The Other Theology +287 +70,829 29.0%
Church of the Brethren Evangelical Protestant 0 -199 -18.0%
Church of the Nazarene Evangelical Protestant 0 +925 6.0%
Churches of Christ Evangelical Protestant +3 +23 1.0%
Conservative Baptist Association of America Evangelical Protestant +1 -1,478 -48.0%
Conservative Congregational Christian Conference Evangelical Protestant +3 +373 100.0%
Episcopal Church Mainline Protestant +2 -1,551 -18.0%
Evangelical Free Church of America, The Evangelical Protestant +6 +722 587.0%
Evangelical Lutheran Church in America Mainline Protestant +3 +526 4.0%
Free Methodist Church of North America Evangelical Protestant 0 +155 8.0%
Friends (Quakers) Mainline Protestant +12 +728 49.0%
Greek Orthodox Archdiocese of America Orthodox +2 +459 n.a.
Independent, Charismatic Churches Evangelical Protestant +3 +3,800 n.a.
Independent, Non-Charismatic Churches Evangelical Protestant +4 +6,100 n.a.
International Church of the Foursquare Gospel Evangelical Protestant +19 +1,429 111.0%
Jewish Estimate Other Theology +1 +1,022 3650.0%
Lutheran Church--Missouri Synod Evangelical Protestant +5 +536 4.0%
Missionary Church, The Evangelical Protestant 0 -4 -8.0%
National Association of Free Will Baptists Evangelical Protestant +6 +322 n.a.
North American Baptist Conference Evangelical Protestant +1 +175 114.0%
Pentecostal Church of God Evangelical Protestant +9 +824 n.a.
Presbyterian Church (U.S.A.) Mainline Protestant -1 -2,453 -20.0%
Reformed Church in America Mainline Protestant +2 +1,646 661.0%
Salvation Army, The Evangelical Protestant +1 +117 11.0%
Seventh-day Adventist Church Evangelical Protestant +10 +1,781 29.0%
Southern Baptist Convention Evangelical Protestant +31 +6,371 70.0%
Unitarian Universalist Association of Congregations Other Theology +4 +487 293.0%
United Church of Christ Mainline Protestant -2 -946 -34.0%
United Methodist Church, The Mainline Protestant -2 -4,620 -21.0%
Universal Fellowship of Metropolitan Community Churches Mainline Protestant 0 -41 -51.0%
Wesleyan Church, The Evangelical Protestant +3 +763 n.a.
Wisconsin Evangelical Lutheran Synod Evangelical Protestant +3 +298 218.0%
  Totals: +435 +152,186 +32.6%

The population of these 44 counties (or equivalents) in 1980 was 943,935; in 2000 it was 1,293,953. The total population changed 28.5%. The adherent totals for 1980 (466,844) represent 49.5% of the 1980 population. The adherent totals for 2000 (627,262) include 48.5% of the 2000 population. There is sufficient data for 45 groups to calculate 1980-2000 change. These 45 groups had 466,371 adherents in 1980 and 618,557 adherents in 2000, for a change of 32.6%

Sources

The 2000 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and includes statistics for 149 religious groups, including number of churches and adherents. Dale E. Jones, Sherri Doty, Clifford Grammich, James E. Horsch, Richard Houseal, Mac Lynn, John P. Marcum, Kenneth M. Sanchagrin and Richard H. Taylor supervised the collection. These data originally appeared in Religious Congregations & Membership in the United States, 2000, published by the Glenmary Research Center.

The 1980 data were collected by the Glenmary Research Center and include statistics for 111 Judeo-Christian church bodies, including number of churches and adherents. Bernard Quinn, Herman Anderson, Martin Bradley, Paul Goetting and Peggy Shriver supervised the collection. These data originally appeared in Churches and Church Membership in the United States, 1980, published by the Glenmary Research Center.

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