St. Anthony, ID -- U.S. city in Idaho Population (2000): 3342 Housing Units (2000): 1218 Land area (2000): 1.302935 sq. miles (3.374586 sq. km) Water area (2000): 0.012282 sq. miles (0.031809 sq. km) Total area (2000): 1.315217 sq. miles (3.406395 sq. km) FIPS code: 71020 Located within: Idaho (ID), FIPS 16 Location: 43.966079 N, 111.684480 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: St. Anthony, ID St. Anthony