30068 -- U.S. ZIP code Municipality (1990): MARIETTA, Georgia All ZIPs for this municipality (1990): 30060 30062 30064 30066 30067 30068 Population (2000): 31878 Housing Units (2000): 12225 Land area (2000): 14.293967 sq. miles (37.021202 sq. km) Water area (2000): 0.122962 sq. miles (0.318471 sq. km) Total area (2000): 14.416929 sq. miles (37.339673 sq. km) Located within: Georgia (GA) Location: 33.965601 N, 84.443300 W