Walkersville, MissouriWalkersville is an unincorporated community in Shelby County, in the U.S. state of Missouri.HistoryWalkersville had its start in 1839 when a mill was built at the site. A post office called Walkersville was established in 1853, and remained in operation until 1891. The community was named after David O. Walker, proprietor of the early mill.