The Church of God of the Original Mountain Assembly is a small Holiness Pentecostal Christian body with roots in the late 19th-century Wesleyan-Holiness movement and early 20th-century Pentecostal revival.
It shares its early history with the Church of God Mountain Assembly.
Representatives from churches which withdrew from the South Union Association of United Baptists met at the Jellico Creek church in Whitley County, Kentucky and formed a new association.
"Of the Mountain Assembly" was added later to distinguish this group from many others denominated Church of God.
According to J. Gordon Melton's The Encyclopedia of American Religions, the Church of God of the Original Mountain Assembly had 11 congregations in 1967.