North Texas generally refers to the counties in the north-central part of the state, excluding those in the Texas Panhandle. It covers the metro areas of Dallas-Fort Worth and Wichita Falls and their surrounding counties. It is the state's most populous region. Land for sale in Rockwall County recently totaled almost $420 million and approximately 3,000 acres. Rockwall County ranks 71st in the state for the total acreage of land currently advertised for sale. Rockwall had the most land for sale. Rockwall County is Texas's 254th largest county (148 square miles). It's located in the Dallas Prairie Texas region of Texas.