Dukedom is an unincorporated community in both Graves County, Kentucky and Weakley County, Tennessee, straddling the state line in the western part of both states. The location is 36°30′8″N 88°42′54″W / 36.50222°N 88.71500°W / 36.50222; -88.71500; The elevation is 487 feet above sea level.
The community is notable as the location of the Knob Creek Church of Christ, established in June 1834, the first Restoration Movement congregation to adopt the name Church of Christ.
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