Of 87 counties in the Land of 10,000 Lakes, Martin County ranks 36th by size (729 square miles). Martin County is in Southern Minnesota. Recent Land Network data records roughly 1,000 acres of lakefront property for sale in Minnesota's Martin County, which is valued at a combined $5 million. Browse all waterfront property for sale in Martin 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 Martin County is house.