30004 -- U.S. ZIP code Population (2000): 41345 Housing Units (2000): 16684 Land area (2000): 68.030424 sq. miles (176.197982 sq. km) Water area (2000): 0.359677 sq. miles (0.931558 sq. km) Total area (2000): 68.390101 sq. miles (177.129540 sq. km) Located within: Georgia (GA) Location: 34.119177 N, 84.302926 W