30088 -- U.S. ZIP code Municipality (1990): STONE MOUNTAIN, Georgia All ZIPs for this municipality (1990): 30083 30087 30088 Population (2000): 29211 Housing Units (2000): 10456 Land area (2000): 7.882202 sq. miles (20.414808 sq. km) Water area (2000): 0.051062 sq. miles (0.132249 sq. km) Total area (2000): 7.933264 sq. miles (20.547057 sq. km) Located within: Georgia (GA) Location: 33.762106 N, 84.179387 W