30157 -- U.S. ZIP code Population (2000): 28005 Housing Units (2000): 9920 Land area (2000): 83.816445 sq. miles (217.083586 sq. km) Water area (2000): 0.549140 sq. miles (1.422265 sq. km) Total area (2000): 84.365585 sq. miles (218.505851 sq. km) Located within: Georgia (GA) Location: 33.892504 N, 84.834602 W