Georgetown, MissouriGeorgetown is an unincorporated community in Pettis County, Missouri, United States.The community is located on Missouri Route H approximately one mile west of U.S. Route 65 and three miles north of Sedalia.HistoryGeorgetown was platted in 1833, and named after Georgetown, Kentucky, the native home of an early settler. A post office called Georgetown was established in 1837, and remained in operation until 1921.