Which is the only US state to border one of the three Canadian Territories?

Alaska is bordered by Canada's Yukon and British Columbia to the east (making it is the only state to border a Canadian territory).

There are 10 Canadian provinces, with three territories to the north. The provinces are, in alphabetical order: Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island, Quebec, and Saskatchewan. The three territories are Northwest Territories, Nunavut, and Yukon.

The difference between a province and a territory has to do with their governance. Basically, the territories have delegated powers under the authority of the Parliament of Canada; they are grouped together and ruled by the federal government. The provinces, on the other hand, exercise constitutional powers in their own right. This imbalance of power is gradually being rectified, with local decision-making powers being granted to the territories.