30820 -- U.S. ZIP code Municipality (1990): MITCHELL, Georgia All ZIPs for this municipality (1990): 30820 Population (2000): 1117 Housing Units (2000): 550 Land area (2000): 100.456116 sq. miles (260.180135 sq. km) Water area (2000): 0.178270 sq. miles (0.461716 sq. km) Total area (2000): 100.634386 sq. miles (260.641851 sq. km) Located within: Georgia (GA) Location: 33.224199 N, 82.713008 W