St. Mary's, AK -- U.S. city in Alaska Population (2000): 500 Housing Units (2000): 186 Land area (2000): 43.949786 sq. miles (113.829419 sq. km) Water area (2000): 6.258938 sq. miles (16.210574 sq. km) Total area (2000): 50.208724 sq. miles (130.039993 sq. km) FIPS code: 66140 Located within: Alaska (AK), FIPS 02 Location: 62.045305 N, 163.218629 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: St. Mary's, AK St. Mary's