NULL Of 254 counties in the Lone Star State, Madison County is 242nd in terms of its size (472 square miles). Madison County is in Brazos Texas. Texas's Madison County has 1,000 acres of riverfront land and property for sale based on recent Land Network data. The combined market value of land and rural real estate for sale here was approximately $8 million. Browse all waterfront property for sale in Madison 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 Madison County is residential property.