I think it is Oregon
==============
Although South Dakota's northern border is a little farther north than Oregon's, the answer is actually "Wisconsin."
The borders of Michigan and Minnesota converge in Lake Superior south of the International Boundary. The point at which they converge is the northernmost point in Wisconsin, and the northernmost part of a US state that does not share a border with Canada.
The northernmost state in the New England region is Maine. It shares its northern border with Canada and is known for its rugged coastline, forests, and picturesque towns. Maine is also famous for its seafood, particularly lobster.
The largest state by area south of Canada is Texas. The largest state by area adjacent to Canada's southern border is Montana. The largest state by population south of Canada is California. The largest state by population adjacent to Canada's southern border is New York.
Its northern border is closer to the north pole than the northern border of any other state.
Any state that shares a border with Canada is a cold state.
washington, idaho, montana, north dakota, minnesota, michigan, ohio, pennslyvania, new york, vermont, new hampshire, and maine =========== P.S. Don't forget Alaska, the northernmost state.
Minnesota
The State of Alaska, which is part of the United States, has a border with the northwestern region of Canada.
Alaska is the northernmost state in the US.
The most northern of the southern states in the United States of America is the state of Maryland. Although not usually considered a southern state, the state of Delaware may also be the northernmost of the southern states as it shares a northern border with Maryland.
In the west, the state of Montana has the longest linear border with Canada. In the east, the state of Michigan has the longest border, including the Great Lakes.
Washington shares a border with Canada
Alaska borders no U.S. states, only the nation of Canada.