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. The largest state by total area in New England, 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 U.S. state. Approximately half the area of Maine lies on each side of the 45th parallel north in latitude. The most populous city in Maine is Portland, while its capital is Augusta.
Charlotte County is the southwest-most county of New Brunswick, Canada.
Grand Manan is a Canadian island in the Bay of Fundy. Grand Manan is also the name of an incorporated village, which includes the main island and numerous nearby islands; White Head Island, small islands near it, and Machias Seal Island are not part of the village. It is governed as a village and is part of the province of New Brunswick.
The Aroostook War, or the Madawaska War, was a military and civilian-involved confrontation in 1838–1839 between the United States and the United Kingdom over the international boundary between the British colony of New Brunswick and the U.S. state of Maine. The term "war" was rhetorical; local militia units were called out but never engaged in actual combat. The event is best described as an international incident.
The Webster–Ashburton Treaty, signed August 9, 1842, was a treaty that resolved several border issues between the United States and the British North American colonies. Signed under John Tyler's presidency, it resolved the so-called Aroostook War. The provisions of the treaty included:
Campobello Island is the largest and only inhabited island in Campobello, a civil parish in southwestern New Brunswick, Canada, near the border with Maine, United States. The island's permanent population in 2021 was 949. It is the site of the Roosevelt Campobello International Park and of Herring Cove Provincial Park.
The St. Croix River is a river in northeastern North America, 71 miles (114 km) in length, that forms part of the Canada–United States border between Maine (U.S.) and New Brunswick (Canada). The river rises in the Chiputneticook Lakes and flows south and southeast, between Calais and St. Stephen. It discharges into Passamaquoddy Bay, in the Bay of Fundy.
The Aroostook River is a 112-mile-long (180 km) tributary of the Saint John River in the U.S. state of Maine and the Canadian province of New Brunswick. Its basin is the largest sub-drainage of the Saint John River.
The border between Canada and the United States is the longest international border in the world. The terrestrial boundary is 8,891 km (5,525 mi) long. The land border has two sections: Canada's border with the contiguous United States to its south, and with the U.S. state of Alaska to its west. The bi-national International Boundary Commission deals with matters relating to marking and maintaining the boundary, and the International Joint Commission deals with issues concerning boundary waters. The agencies currently responsible for facilitating legal passage through the international boundary are the Canada Border Services Agency (CBSA) and U.S. Customs and Border Protection (CBP).
Machias Seal Island is an island in disputed water between the Gulf of Maine and the Bay of Fundy, about 16 km (10 mi) southeast from Cutler, Maine, and 19 km (12 mi) southwest of Grand Manan Island, New Brunswick. Sovereignty of the island is disputed by the United States and Canada. The Canadian Coast Guard continues to staff a lighthouse on the island; the first lighthouse was constructed there in 1832.
The Gulf of Maine is a large gulf of the Atlantic Ocean on the east coast of North America. It is bounded by Cape Cod at the eastern tip of Massachusetts in the southwest and by Cape Sable Island at the southern tip of Nova Scotia in the northeast. The gulf includes the entire coastlines of the U.S. states of New Hampshire and Maine, as well as Massachusetts north of Cape Cod, and the southern and western coastlines of the Canadian provinces of New Brunswick and Nova Scotia, respectively.
Passamaquoddy Bay is an inlet of the Bay of Fundy, between the U.S. state of Maine and the Canadian province of New Brunswick, at the mouth of the St. Croix River. Most of the bay lies within Canada, with its western shore bounded by Washington County, Maine. The southernmost point is formed by West Quoddy Head on the U.S. mainland in Lubec, Maine; and runs northeasterly through Campobello Island, New Brunswick, engulfing Deer Island, New Brunswick, to the New Brunswick mainland head at L'Etete, New Brunswick in Charlotte County, New Brunswick.
The Republic of Madawaska was a putative republic in the northwest corner of Madawaska County, New Brunswick and adjacent areas of Aroostook County in the US state of Maine and of Quebec. The word "Madawaska" comes from the Miꞌkmaq words madawas and kak (porcupine). Thus, the Madawaska is "the country of the porcupine". The Madawaska River which flows into the Saint John River at Edmundston, New Brunswick, and Madawaska, Maine, flows through the region.
The Atlantic Northeast is a geographic and cultural region of eastern North America bounded by the Atlantic Ocean to the east and (loosely) by the Saint Lawrence River to the northwest. This region, prior to colonization, was known as Dawnland, a translation from its name across numerous Algonquian languages, each a slight permutation of the term Wabanaki. Though no official boundary exists, the most common conception includes the Maritime provinces, southern Quebec, and the island of Newfoundland in Canada, and the New England region of the United States. Broader conceptions reach further north into Canada, including Labrador and the Côte-Nord region of Quebec. Narrower conceptions may be limited to the coastal areas east of the Appalachian Mountains. The variety of definitions can be attributed to overlapping commonalities of the region's history, culture, geography, ecology, society, and other factors.
The history of post-confederation Canada began on July 1, 1867, when the British North American colonies of Canada, New Brunswick, and Nova Scotia were united to form a single Dominion within the British Empire. Upon Confederation, the United Province of Canada was immediately split into the provinces of Ontario and Quebec. The colonies of Prince Edward Island and British Columbia joined shortly after, and Canada acquired the vast expanse of the continent controlled by the Hudson's Bay Company, which was eventually divided into new territories and provinces. Canada evolved into a fully sovereign state by 1982.
Border irregularities of the United States, particularly panhandles and highway incursions into other jurisdictions, are shown here. Often they are a result of borders which do not conform to geological features such as changes in the course of a river that previously marked a border.
While the United States has relatively complicated maritime boundaries, it shares international land borders with only two nations:
Fort Kent State Historic Site is a Maine state park in the town of Fort Kent, Maine. Located at the confluence of the Fish and Saint John Rivers, it includes Fort Kent, the only surviving American fortification built during border tensions with neighboring New Brunswick known as the Aroostook War. The park features an original log blockhouse, which is open for visits in the summer. The fort was added to the National Register of Historic Places in 1969 and declared a National Historic Landmark in 1973.
