31312 -- U.S. ZIP code Municipality (1990): GUYTON, Georgia All ZIPs for this municipality (1990): 31312 Population (2000): 10911 Housing Units (2000): 3986 Land area (2000): 165.945745 sq. miles (429.797487 sq. km) Water area (2000): 0.292231 sq. miles (0.756875 sq. km) Total area (2000): 166.237976 sq. miles (430.554362 sq. km) Located within: Georgia (GA) Location: 32.313816 N, 81.390806 W