10594 -- U.S. ZIP code Municipality (1990): THORNWOOD, New York All ZIPs for this municipality (1990): 10594 Population (2000): 5460 Housing Units (2000): 1677 Land area (2000): 2.892230 sq. miles (7.490842 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.892230 sq. miles (7.490842 sq. km) Located within: New York (NY) Location: 41.120025 N, 73.776878 W