Maine (Wikipedia) Maine (/meɪn/) is the easternmost state in the New England region of the Northeastern United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and northwest, respectively. Although Maine is the largest state in New England by total area, of the 50 U.S. states it is the 12th-smallest by area, the 9th-least populous, the 13th-least densely populated, and the most rural. Maine’s capital is Augusta, and its most populous city is Portland, with a total population of 68,408, as of the April 2020 census.