Maine is a state in the New England region of the United States, bordered by 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 12th-smallest by area, the 9th-least populous, the 13th-least densely populated, and the most rural of the 50 U.S. states. It is also the northeasternmost among the contiguous United States, the northernmost state east of the Great Lakes, the only state whose name consists of a single syllable, and the only state to border exactly one other US state. The most populous city in Maine is Portland, while its capital is Augusta.

Maine has traditionally been known for its jagged, rocky Atlantic Ocean and bayshore coastlines; smoothly contoured mountains; heavily forested interior; picturesque waterways; and its wild lowbush blueberries and seafood cuisine, especially lobster and clams. In more recent years coastal and Down East Maine, especially in the vicinity of Portland, have emerged as an important center for the creative economy, which is also bringing gentrification.

For thousands of years after the glaciers retreated during the last ice age, indigenous peoples were the only inhabitants of the territory that is now Maine. At the time of European arrival, several Algonquian-speaking peoples inhabited the area. The first European settlement in the area was by the French in 1604 on Saint Croix Island, founded by Pierre Dugua, Sieur de Mons. The first English settlement was the short-lived Popham Colony, established by the Plymouth Company in 1607. A number of English settlements were established along the coast of Maine in the 1620s, although the rugged climate and conflict with the local indigenous people caused many to fail.