Sumter County is a county located in the U.S. state of South Carolina. As of the 2010 census, the population was 107,456; in a 2013 census estimate, the population was at 108,123. Its county seat is Sumter.
Sumter County comprises the Sumter, SC Metropolitan Statistical Area.
It is the home of Shaw AFB, headquarters to the 9th Air Force, AFCENT, 3rd Army and ARCENT, with a number of other tenant units. It is one of largest bases in the USAF's Air Combat Command.