Troy, ID -- U.S. city in Idaho Population (2000): 798 Housing Units (2000): 341 Land area (2000): 0.794213 sq. miles (2.057003 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.794213 sq. miles (2.057003 sq. km) FIPS code: 82360 Located within: Idaho (ID), FIPS 16 Location: 46.738571 N, 116.770785 W ZIP Codes (1990): 83871 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Troy, ID Troy