Of 77 counties in the state, Seminole County ranks 61st by size (640 square miles). Seminole County is in Frontier Country Oklahoma. The total value of around 1,000 acres of lakefront property recently listed for sale in Seminole County, Oklahoma, was $300,000. Browse all waterfront property for sale in Seminole County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Seminole County is residential property.