31808 -- U.S. ZIP code Municipality (1990): FORTSON, Georgia All ZIPs for this municipality (1990): 31808 Population (2000): 4773 Housing Units (2000): 1888 Land area (2000): 50.912310 sq. miles (131.862271 sq. km) Water area (2000): 0.154611 sq. miles (0.400441 sq. km) Total area (2000): 51.066921 sq. miles (132.262712 sq. km) Located within: Georgia (GA) Location: 32.638885 N, 85.007365 W