Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Atoka County is a county located in the U.S. state of Oklahoma, and was formed in 1907 from Choctaw Lands. As of 2000, the population is 13,879. Its county seat is Atoka. According to the U.S. Census Bureau, the county has a total area of 990 square miles (2,564.1 km2), of which 978 square miles (2,533.0 km2) is land and 12 square miles (31.1 km2) (1.18%) is water. Atoka County is drained by Clear Boggy and Muddy Boggy Creeks. Atoka Reservoir is in the northern section of the county. About 12 miles WSW of the town of Atoka is Boggy Depot State Park, the historic site of a once large community on the Butterfield Overland Mail stagecoach route.