12033 -- U.S. ZIP code Municipality (1990): CASTLETON ON HUD, New York All ZIPs for this municipality (1990): 12033 Population (2000): 8188 Housing Units (2000): 3217 Land area (2000): 31.554484 sq. miles (81.725735 sq. km) Water area (2000): 0.094634 sq. miles (0.245100 sq. km) Total area (2000): 31.649118 sq. miles (81.970835 sq. km) Located within: New York (NY) Location: 42.534631 N, 73.713270 W