While the
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...
has relatively complicated maritime boundaries, it shares international land borders with only two nations:
* The
Canada–United States border
The border between Canada and the United States is the longest international border in the world. The terrestrial boundary (including boundaries in the Great Lakes, Atlantic, and Pacific coasts) is long. The land border has two sections: Can ...
to the north of the
contiguous United States
The contiguous United States (officially the conterminous United States) consists of the 48 adjoining U.S. states and the Federal District of the United States of America. The term excludes the only two non-contiguous states, Alaska and Hawaii ...
and to the east of
Alaska
Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., ...
, and
* The
Mexico–United States border
The Mexico–United States border ( es, frontera Estados Unidos–México) is an international border separating Mexico and the United States, extending from the Pacific Ocean in the west to the Gulf of Mexico in the east. The border traver ...
to the south.
Maritime boundaries
Out in the ocean, the US borders are more complex.
The
Russia–United States maritime boundary was defined by an agreement made by the United States and the USSR in 1990 covering the Bering Sea, Bering Strait, and Arctic Ocean. The boundary line generally follows the 1867 Alaska Cession line, but the agreement has not entered into force. The USA ratified the
USSR–USA Maritime Boundary Agreement
The Russia–United States maritime boundary was established by the June 1, 1990 USA/USSR Maritime Boundary Agreement (since Russia declared itself to be the successor of the Soviet Union). The United States Senate gave its advice and consent to ...
, but the USSR failed to ratify it before dissolving, and it has not been ratified by
Russia
Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...
.
The United States has entered maritime boundary agreements with Mexico, Cuba, Venezuela, and with the United Kingdom in the Caribbean. The maritime boundary with
Canada
Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
in the Atlantic was determined by the
International Court of Justice
The International Court of Justice (ICJ; french: Cour internationale de justice, links=no; ), sometimes known as the World Court, is one of the six principal organs of the United Nations (UN). It settles disputes between states in accordanc ...
in the Gulf of Maine Case (1984). M.B. Feldman, Association for Diplomatic Studies and Training, Foreign Oral History Collection https://adst.org/OH%20TOCs/Feldman.Mark.pdf The United States also shares a maritime boundary with
the Bahamas
The Bahamas (), officially the Commonwealth of The Bahamas, is an island country within the Lucayan Archipelago of the West Indies in the Atlantic Ocean, North Atlantic. It takes up 97% of the Lucayan Archipelago's land area and is home to ...
and three more with Canada that remain to be determined.
Custom territories
Insular area
In the law of the United States, an insular area is a U.S.-associated jurisdiction that is not part of the 50 states or the District of Columbia. This includes fourteen U.S. territories administered under U.S. sovereignty, as well as three sov ...
s in the Pacific and the
U.S. Virgin Islands are in a separate
customs territory A customs territory is a geographic territory with uniform customs regulations and there are no internal customs or similar taxes within the territory. Customs territories may fall into several types:
* A sovereign state, including a federation
* A ...
from the
50 states, the
District of Columbia
)
, image_skyline =
, image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ...
, and
Puerto Rico
Puerto Rico (; abbreviated PR; tnq, Boriken, ''Borinquen''), officially the Commonwealth of Puerto Rico ( es, link=yes, Estado Libre Asociado de Puerto Rico, lit=Free Associated State of Puerto Rico), is a Caribbean island and Unincorporated ...
. For more information on customs territories, see
Foreign trade of the United States
Foreign trade of the United States comprises the international imports and exports of the United States. The country is among the top three global importers and exporters.
The regulation of trade is constitutionally vested in the United St ...
.
Border disputes
The US also has disputed land borders with seven nations:
*
**
Machias Seal Island
Machias Seal Island is an island in disputed water between the Gulf of Maine and the Bay of Fundy, about southeast from Cutler, Maine, and southwest of Grand Manan Island, New Brunswick. Sovereignty of the island is disputed by the United Sta ...
and
North Rock
North Rock (french: Roche North) is an offshore rock near the boundary between the Gulf of Maine and the Bay of Fundy east of the North American continent. Its ownership is disputed between the Canadian province of New Brunswick and the U.S. sta ...
(
New Brunswick
New Brunswick (french: Nouveau-Brunswick, , locally ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. It is the only province with both English and ...
and
Maine
Maine () is a state in the New England and Northeastern regions of the 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 north ...
) - Occupied by Canada and patrolled by the
Canadian Coast Guard
The Canadian Coast Guard (CCG; french: links=no, Garde côtière canadienne, GCC) is the coast guard of Canada. Formed in 1962, the coast guard is tasked with marine search and rescue (SAR), communication, navigation, and transportation issues in ...
, claimed by the US.
*
**
Guantanamo Bay Naval Base
Guantanamo Bay Naval Base ( es, Base Naval de la Bahía de Guantánamo), officially known as Naval Station Guantanamo Bay or NSGB, (also called GTMO, pronounced Gitmo as jargon by members of the U.S. military) is a United States military base ...
- Since the
Cuban Revolution
The Cuban Revolution ( es, Revolución Cubana) was carried out after the 1952 Cuban coup d'état which placed Fulgencio Batista as head of state and the failed mass strike in opposition that followed. After failing to contest Batista in cou ...
of 1959, the Cuban communist government has consistently protested against the U.S. presence on Cuban soil and called it "illegal" under
international law
International law (also known as public international law and the law of nations) is the set of rules, norms, and standards generally recognized as binding between states. It establishes normative guidelines and a common conceptual framework for ...
. The US acquired the bay from the
Spanish-American War
Spanish Americans ( es, españoles estadounidenses, ''hispanoestadounidenses'', or ''hispanonorteamericanos'') are Americans whose ancestry originates wholly or partly from Spain. They are the longest-established European American group in th ...
as a lease from Cuba.
*
**
Navassa Island
Navassa Island (; ht, Lanavaz; french: l'île de la Navasse, sometimes ) is a small uninhabited island in the Caribbean Sea. Located northeast of Jamaica, south of Cuba, and west of Jérémie on the Tiburon Peninsula of Haiti, it is subject to ...
- The US claimed the Navassa island via the
Guano Islands Act of 1856
Guano (Spanish from qu, wanu) is the accumulated excrement of seabirds or bats. As a manure, guano is a highly effective fertilizer due to the high content of nitrogen, phosphate, and potassium, all key nutrients essential for plant growth. ...
. Haiti claimed sovereignty over the island in 1801, but was occupied by the US through
gunboat diplomacy
In international politics, the term gunboat diplomacy refers to the pursuit of foreign policy objectives with the aid of conspicuous displays of naval power, implying or constituting a direct threat of warfare should terms not be agreeable to th ...
.
* , ,
**
Bajo Nuevo Bank
Bajo Nuevo Bank, also known as the Petrel Islands ( es, Bajo Nuevo, Islas Petrel), is a small, uninhabited reef with some small grass-covered islets, located in the western Caribbean Sea at , with a lighthouse on Low Cay at . The closest neighbo ...
- Administered by Colombia, claimed by the US as an unorganized,
unincorporated territory
Territories of the United States are sub-national administrative divisions overseen by the federal government of the United States. The various American territories differ from the U.S. states and tribal reservations as they are not sove ...
.
* , ,
**
Serranilla Bank
Serranilla Bank ( es, Isla Serranilla, Banco Serranilla and ''Placer de la Serranilla'') is a partially submerged reef, with small uninhabited islets, in the western Caribbean Sea. It is situated about northeast of Punta Gorda, Nicaragua, and ...
- Administered by Colombia, claimed by the US as an unorganized,
unincorporated territory
Territories of the United States are sub-national administrative divisions overseen by the federal government of the United States. The various American territories differ from the U.S. states and tribal reservations as they are not sove ...
.
Additionally, the US has maritime border disputes with Canada:
*
Strait of Juan de Fuca
The Strait of Juan de Fuca (officially named Juan de Fuca Strait in Canada) is a body of water about long that is the Salish Sea's outlet to the Pacific Ocean. The international boundary between Canada and the United States runs down the centre ...
*
Beaufort Sea
The Beaufort Sea (; french: Mer de Beaufort, Iñupiaq: ''Taġiuq'') is a marginal sea of the Arctic Ocean, located north of the Northwest Territories, the Yukon, and Alaska, and west of Canada's Arctic islands. The sea is named after Sir Fr ...
-
Yukon–Alaska dispute
*
Dixon Entrance
The Dixon Entrance (french: Entrée Dixon) is a strait about long and wide in the Pacific Ocean at the Canada–United States border, between the U.S. state of Alaska and the province of British Columbia in Canada. The Dixon Entrance is part o ...
- Dispute stems from the ambiguity of the Hay–Herbert Treaty in 1903 between the United States and the
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...
signed to settle the
Alaska boundary dispute
The Alaska boundary dispute was a territorial dispute between the United States and the United Kingdom of Great Britain and Ireland, which then controlled Canada's foreign relations. It was resolved by arbitration in 1903. The dispute had existed ...
, an agreement opposed by Canadian leaders.
Agencies
U.S. Customs and Border Protection
United States Customs and Border Protection (CBP) is the largest federal law enforcement agency of the United States Department of Homeland Security. It is the country's primary border control organization, charged with regulating and facilit ...
is responsible for policing the borders and inspecting people and goods being imported.
The
United States Coast Guard
The United States Coast Guard (USCG) is the maritime security, search and rescue, and law enforcement service branch of the United States Armed Forces and one of the country's eight uniformed services. The service is a maritime, military, mult ...
actively patrols the nation's extensive maritime borders.
The
United States Armed Forces
The United States Armed Forces are the military forces of the United States. The armed forces consists of six service branches: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. The president of the United States is the ...
and state and local police may also become involved in border enforcement in certain circumstances.
Total list
See also
*
Border irregularities of the United States
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 ...
References
External links
Border Securityat CBP
Secure and Manage Bordersat DHS
Border Securityat the WhiteHouse.gov
The Constitution in the 100-Mile Border Zoneat ACLU
{{North America topic , Borders of
Geography of the United States