33803 -- U.S. ZIP code Municipality (1990): LAKELAND, Florida All ZIPs for this municipality (1990): 33801 33803 33805 33809 Population (2000): 26994 Housing Units (2000): 13760 Land area (2000): 16.369116 sq. miles (42.395814 sq. km) Water area (2000): 0.824925 sq. miles (2.136545 sq. km) Total area (2000): 17.194041 sq. miles (44.532359 sq. km) Located within: Florida (FL) Location: 28.015032 N, 81.952066 W