35646 -- U.S. ZIP code Municipality (1990): LEIGHTON, Alabama All ZIPs for this municipality (1990): 35646 Population (2000): 4998 Housing Units (2000): 2156 Land area (2000): 93.037960 sq. miles (240.967199 sq. km) Water area (2000): 0.271662 sq. miles (0.703602 sq. km) Total area (2000): 93.309622 sq. miles (241.670801 sq. km) Located within: Alabama (AL) Location: 34.660322 N, 87.535777 W