31003 -- U.S. ZIP code Municipality (1990): ALLENTOWN, Georgia All ZIPs for this municipality (1990): 31003 Population (2000): 220 Housing Units (2000): 105 Land area (2000): 5.834715 sq. miles (15.111842 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 5.834715 sq. miles (15.111842 sq. km) Located within: Georgia (GA) Location: 32.600622 N, 83.220962 W