30555 -- U.S. ZIP code Municipality (1990): MC CAYSVILLE, Georgia All ZIPs for this municipality (1990): 30555 Population (2000): 2079 Housing Units (2000): 1112 Land area (2000): 10.841730 sq. miles (28.079950 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 10.841730 sq. miles (28.079950 sq. km) Located within: Georgia (GA) Location: 34.977037 N, 84.398393 W