NULL Of 254 counties in the Lone Star State, Armstrong County is 140th in terms of its size (913 square miles). Armstrong County is in Panhandle Texas. There is approximately 1,000 acres of lakefront property for sale in Texas's Armstrong County based on recent Land Network data. The combined market value of farms and ranches for sale here is almost $700,000. Browse all waterfront property for sale in Armstrong 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 Armstrong County is farms.