Mercer County is in Northwest Missouri. Of the 115 counties in the Show Me State, 291,270-acre Mercer County ranks 95th by size. The most common type of land for sale by combined acreage in Mercer County is farms. Browse all waterfront property for sale in Mercer 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!