30013 -- U.S. ZIP code Population (2000): 18659 Housing Units (2000): 6970 Land area (2000): 28.577201 sq. miles (74.014608 sq. km) Water area (2000): 0.065831 sq. miles (0.170502 sq. km) Total area (2000): 28.643032 sq. miles (74.185110 sq. km) Located within: Georgia (GA) Location: 33.633685 N, 83.983821 W