Comal County is in San Antonio Texas. Of the 254 counties in the Lone Star State, Comal County is 238th in terms of its size (574 square miles). The most common type of land for sale by combined acreage in Comal County is residential property. Browse all waterfront property for sale in Comal 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! South Texas is typically classified as the area between the San Antonio metro area and south to the Rio Grande and Gulf of Mexico.