WebSumter, SC 29150. Phone: (803) 436-2270 or (803) 436-2271. Fax: (803) 436-2272. Hours of Operation: Monday to Friday 8:30 a.m. to 5 p.m. Equipment Rental Rates. The Sumter County Civic Center is centrally located in the State of South Carolina with easy access to I-20, I-26, and I-95, with a population of 148,888 , which includes an adjacent ...