Cornelia is an unincorporated community in southern Johnson County, in the U.S. state of Missouri.[1] The community is on Missouri Route 13 seven miles south of Warrensburg and five miles north of Post Oak.[2] A post office called Cornelia was established in 1855, and remained in operation until 1904.[3] The community was named after Cornelia Love, the wife of an early settler.This Johnson County, Missouri state location article is a stub.