30034 -- U.S. ZIP code Municipality (1990): DECATUR, Georgia All ZIPs for this municipality (1990): 30030 30032 30033 30034 30035 Population (2000): 44917 Housing Units (2000): 15424 Land area (2000): 17.321293 sq. miles (44.861940 sq. km) Water area (2000): 0.125638 sq. miles (0.325401 sq. km) Total area (2000): 17.446931 sq. miles (45.187341 sq. km) Located within: Georgia (GA) Location: 33.693448 N, 84.247435 W