30168 -- U.S. ZIP code Population (2000): 20564 Housing Units (2000): 8103 Land area (2000): 12.245274 sq. miles (31.715114 sq. km) Water area (2000): 0.020804 sq. miles (0.053883 sq. km) Total area (2000): 12.266078 sq. miles (31.768997 sq. km) Located within: Georgia (GA) Location: 33.797456 N, 84.606211 W