30721 -- U.S. ZIP code Municipality (1990): DALTON, Georgia All ZIPs for this municipality (1990): 30720 30721 Population (2000): 40233 Housing Units (2000): 14168 Land area (2000): 121.979815 sq. miles (315.926258 sq. km) Water area (2000): 0.226005 sq. miles (0.585350 sq. km) Total area (2000): 122.205820 sq. miles (316.511608 sq. km) Located within: Georgia (GA) Location: 34.780699 N, 84.939946 W