31631 -- U.S. ZIP code Municipality (1990): FARGO, Georgia All ZIPs for this municipality (1990): 31631 Population (2000): 666 Housing Units (2000): 312 Land area (2000): 215.048387 sq. miles (556.972743 sq. km) Water area (2000): 3.404674 sq. miles (8.818065 sq. km) Total area (2000): 218.453061 sq. miles (565.790808 sq. km) Located within: Georgia (GA) Location: 30.680867 N, 82.580286 W