35633 -- U.S. ZIP code Municipality (1990): FLORENCE, Alabama All ZIPs for this municipality (1990): 35630 35633 Population (2000): 19521 Housing Units (2000): 8229 Land area (2000): 208.553330 sq. miles (540.150623 sq. km) Water area (2000): 0.067526 sq. miles (0.174892 sq. km) Total area (2000): 208.620856 sq. miles (540.325515 sq. km) Located within: Alabama (AL) Location: 34.898897 N, 87.773796 W