Which state borders Canada?

Maine is the correct choice because it shares a long border with Canada, specifically with the Canadian provinces of New Brunswick and Quebec. This makes it the only state in the contiguous United States that borders Canada to the east. The border stretches over 600 miles, facilitating trade, cultural exchange, and other cross-border relations between the two regions. Understanding this geographical relationship is essential for recognizing the historical and economic ties between Maine and Canada.

In contrast, Texas, California, and Oregon do not share a border with Canada. Texas is located in the south-central region of the U.S. and borders Mexico. California is situated on the West Coast, with Mexico to the south and the Pacific Ocean to the west. Oregon also lies on the West Coast but borders California to the south and Washington to the north, neither of which are Canada. This differentiation is crucial in comprehending the geographical layout of the United States.