East Helena, MT -- U.S. town in Montana Population (2000): 1642 Housing Units (2000): 728 Land area (2000): 0.836155 sq. miles (2.165631 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.836155 sq. miles (2.165631 sq. km) FIPS code: 23125 Located within: Montana (MT), FIPS 30 Location: 46.589856 N, 111.916798 W ZIP Codes (1990): 59635 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: East Helena, MT East Helena