State of Montana A state in the Western United States. To the north, Montana and Canada share a 877 km border. The state borders the Canadian provinces of British Columbia, Alberta, and Saskatchewan. To the east, the state borders North Dakota and South Dakota. To the south is Wyoming and to the west and southwest is Idaho. LanguaL curation note: US FDA 1995 Code: US30 montana West Region State of Montana A state in the Western United States. To the north, Montana and Canada share a 877 km border. The state borders the Canadian provinces of British Columbia, Alberta, and Saskatchewan. To the east, the state borders North Dakota and South Dakota. To the south is Wyoming and to the west and southwest is Idaho. LanguaL curation note: US FDA 1995 Code: US30 montana West Region