33576 -- U.S. ZIP code Municipality (1990): SAN ANTONIO, Florida All ZIPs for this municipality (1990): 33576 Population (2000): 2356 Housing Units (2000): 1032 Land area (2000): 12.871277 sq. miles (33.336452 sq. km) Water area (2000): 0.394394 sq. miles (1.021476 sq. km) Total area (2000): 13.265671 sq. miles (34.357928 sq. km) Located within: Florida (FL) Location: 28.331979 N, 82.288777 W