31630 -- U.S. ZIP code Municipality (1990): DU PONT, Georgia All ZIPs for this municipality (1990): 31630 Population (2000): 540 Housing Units (2000): 232 Land area (2000): 153.557510 sq. miles (397.712108 sq. km) Water area (2000): 2.164940 sq. miles (5.607168 sq. km) Total area (2000): 155.722450 sq. miles (403.319276 sq. km) Located within: Georgia (GA) Location: 30.963730 N, 82.864556 W