30066 -- U.S. ZIP code Municipality (1990): MARIETTA, Georgia All ZIPs for this municipality (1990): 30060 30062 30064 30066 30067 30068 Population (2000): 50994 Housing Units (2000): 18346 Land area (2000): 27.344769 sq. miles (70.822623 sq. km) Water area (2000): 0.206958 sq. miles (0.536019 sq. km) Total area (2000): 27.551727 sq. miles (71.358642 sq. km) Located within: Georgia (GA) Location: 34.027533 N, 84.514755 W