Oak Grove United Methodist Church began in 1878 with fourteen charter members under the Reverend Jim Smith and the Reverend E.C. Fullingim. In 1880 it became part of the Decatur circuit, and the Reverend R.N. Brown served as its first regular pastor. Its original sanctuary was built ten miles northeast of Decatur and moved to the present site in 1902. The current church building has been in use since 1948, and the congregation, long associated with an August revival camp meeting, is one of the oldest rural churches in Wise County.