Located just 60 miles north of Dallas Grayson County stretches out over 979 square miles and has a population of 125,467 (as of 2015). Founded in 1846 and named after Peter Wagner Grayson, an attorney general of the Republic of Texas. Grayson County residents enjoy the amenities of Lake Texoma, Lake Ray Roberts, and the city of Sherman which all offer a range of fun activities. A combined almost 100,000 acres were listed for sale in Grayson County recently; the overall value of all Grayson County farms and ranches for sale was $2 billion. Grayson County ranks third out of 254 counties in the Lone Star State for the total number of acres of land currently advertised for sale. Sherman featured the most land for sale. Grayson County is Texas's 88th biggest county (979 square miles). It's located in the Texoma Texas region of the state.