Johnston County was created at statehood and named for Douglas H. Johnston, governor of the Chickasaw Nation. The county seat, Tishomingo, was the original capital of the Chickasaw Nation, and uses the old granite Chickasaw capitol building as the Johnston County Courthouse. Major industries in the county are Meridian Aggregates, Unimin, U.S. Silica, Sundowner Trailers, Gusher Tie Factory and Dee's Clothing Manufacturing Company. Wildlife and recreational areas include the Tishomingo National Wildlife Refuge, the Federal Fish Hatchery and Catfish Research Center near Reagan, and the Blue River Public Hunting and Fishing area north of Tishomingo. Blue River is stocked with trout every fall and the annual Trout Derby is held in November. Tishomingo is the home of Murray State College and Technical School and the Chickasaw Council House Museum, Johnston County was the home of both William H. Murray and son Johnston Murray, governors of Oklahoma; and entertainer Gene Autry. Johnston County History, a book by the Johnston County Historical Society, documents the history of the area. Location: Johnston County is in southern Oklahoma. Climate: The average precipitation is 45.8 inches yearly in this area. January's average temperature is 42.4 degrees Fahrenheit and July's average is 80.6 degrees Fahrenheit. County Seat: Tishomingo Distances: Tishomingo to: Ardmore - 31 miles Oklahoma City - 115 miles Land Area: 658 square miles of rolling countryside with two major streams and one large lake extending into Texas