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Adventist churches originate from founder William Miller in the late 19th century, who taught that Christ soon would return to earth and that Saturday rather than Sunday should be observed as the Sabbath. The Adventist family includes the Seventh-day Adventist Church, which was founded by Ellen Gould White and James Springer White, as well as offshoots such as the Advent Christian Church.
Adventist
- Advent Christian Church
- Church of God (Seventh Day), Denver, Colorado
- Church of God General Conference (Oregon, IL and Morrow, GA)
- Jehovah's Witnesses
- Seventh-day Adventist Church
Inactive Denominations (Denomination is defunct, has been renamed or merged with another denomination, or has not reported data since 1980)
- Church of God (Seventh-Day, Salem, West Virginia)
- House of David
- Life and Advent Union
- Primitive Advent Christian Church
- United Seventh-Day Brethren
