Augusta is the capital of the U.S. state of Maine and the county seat of and most populous city in Kennebec County. Augusta is included in the Lewiston-Auburn, Maine metropolitan New England city and town area. The city's population was 18,899 at the 2020 census, making it the 12th most populous city in Maine, and 3rd least populous state capital in the United States after Montpelier, Vermont, and Pierre, South Dakota.

Maine 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. 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 2020 census.