Located in Oklahoma, 658-square-mile Johnston County accounts for less than one percent of the state's total land area. Of the 77 counties in Oklahoma, Johnston County ranks 56th in terms of the size of its population (10,980, according to 2015 Census estimates). Recent Lands of America data shows that the average price-per-acre value of land for sale in Johnston County is $2,535. The average list price of property and land for sale was $487,784 (the most expensive listing being for $2.3 million) and the median land-parcel size was 80 acres. Land for sale in Johnston County totaled 7,888 acres and $20.0 million in overall land value, with the city of Tishomingo featuring the most land for sale in the county. Farmland was the most common type of land for sale in Johnston County.