35456 -- U.S. ZIP code Municipality (1990): DUNCANVILLE, Alabama All ZIPs for this municipality (1990): 35456 Population (2000): 3764 Housing Units (2000): 1478 Land area (2000): 77.706839 sq. miles (201.259781 sq. km) Water area (2000): 0.039920 sq. miles (0.103392 sq. km) Total area (2000): 77.746759 sq. miles (201.363173 sq. km) Located within: Alabama (AL) Location: 33.068806 N, 87.439748 W