33920 -- U.S. ZIP code Municipality (1990): ALVA, Florida All ZIPs for this municipality (1990): 33920 Population (2000): 4710 Housing Units (2000): 1966 Land area (2000): 80.567440 sq. miles (208.668703 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 80.567440 sq. miles (208.668703 sq. km) Located within: Florida (FL) Location: 26.711362 N, 81.616848 W