31552 -- U.S. ZIP code Municipality (1990): MILLWOOD, Georgia All ZIPs for this municipality (1990): 31552 Population (2000): 780 Housing Units (2000): 352 Land area (2000): 72.616618 sq. miles (188.076170 sq. km) Water area (2000): 0.294413 sq. miles (0.762525 sq. km) Total area (2000): 72.911031 sq. miles (188.838695 sq. km) Located within: Georgia (GA) Location: 31.281103 N, 82.620103 W