31742 -- U.S. ZIP code Municipality (1990): GRAVES, Georgia All ZIPs for this municipality (1990): 31742 Population (2000): 9963 Housing Units (2000): 4029 Land area (2000): 319.256114 sq. miles (826.869504 sq. km) Water area (2000): 2.249628 sq. miles (5.826510 sq. km) Total area (2000): 321.505742 sq. miles (832.696014 sq. km) Located within: Georgia (GA) Location: 31.756995 N, 84.433576 W