30030 -- U.S. ZIP code Municipality (1990): DECATUR, Georgia All ZIPs for this municipality (1990): 30030 30032 30033 30034 30035 Population (2000): 25137 Housing Units (2000): 12086 Land area (2000): 6.903495 sq. miles (17.879969 sq. km) Water area (2000): 0.004998 sq. miles (0.012946 sq. km) Total area (2000): 6.908493 sq. miles (17.892915 sq. km) Located within: Georgia (GA) Location: 33.771705 N, 84.294072 W