The Oregon Treaty was a treaty between 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 Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
and the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
that was signed on June 15, 1846, in
Washington, D.C. The treaty brought an end to the
Oregon boundary dispute by settling competing American and British claims to the
Oregon Country; the area had been
jointly occupied by both Britain and the U.S. since the
Treaty of 1818.
Background
The Treaty of 1818 set the boundary between the United States and
British North America
British North America comprised the colonial territories of the British Empire in North America from 1783 onwards. English colonisation of North America began in the 16th century in Newfoundland, then further south at Roanoke and Jamestown, ...
along the
49th parallel of north latitude from
Minnesota
Minnesota ( ) is a U.S. state, state in the Upper Midwestern region of the United States. It is bordered by the Canadian provinces of Manitoba and Ontario to the north and east and by the U.S. states of Wisconsin to the east, Iowa to the so ...
to the "Stony Mountains"
(now known as the
Rocky Mountains
The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch in great-circle distance, straight-line distance from the northernmost part of Western Can ...
). The region west of those mountains was known to the Americans as the
Oregon Country and to the British as the
Columbia Department or Columbia District of the
Hudson's Bay Company
The Hudson's Bay Company (HBC), originally the Governor and Company of Adventurers of England Trading Into Hudson’s Bay, is a Canadian holding company of department stores, and the oldest corporation in North America. It was the owner of the ...
. (Also included in the region was the southern portion of another fur district,
New Caledonia
New Caledonia ( ; ) is a group of islands in the southwest Pacific Ocean, southwest of Vanuatu and east of Australia. Located from Metropolitan France, it forms a Overseas France#Sui generis collectivity, ''sui generis'' collectivity of t ...
.) The treaty provided for joint control of that land for ten years. Both countries could claim land and both were guaranteed free navigation throughout.
Joint control steadily grew less tolerable for both sides. After a British minister rejected the offer of
U.S. Presidents James K. Polk and
John Tyler
John Tyler (March 29, 1790 – January 18, 1862) was the tenth president of the United States, serving from 1841 to 1845, after briefly holding office as the tenth vice president of the United States, vice president in 1841. He was elected ...
to settle the boundary at the
49th parallel north
The 49th parallel north is a circle of latitude that is 49degree (angle), ° true north, north of Earth's equator. It crosses Europe, Asia, the Pacific Ocean, North America, and the Atlantic Ocean.
The city of Paris is about south of the 49t ...
, American
expansionists of the "
All Oregon" movement called for the
annexation
Annexation, in international law, is the forcible acquisition and assertion of legal title over one state's territory by another state, usually following military occupation of the territory. In current international law, it is generally held t ...
of the entire region up to
Parallel 54°40′ north, the southern limit of
Russian America
Russian(s) may refer to:
*Russians (), an ethnic group of the East Slavic peoples, primarily living in Russia and neighboring countries
*A citizen of Russia
*Russian language, the most widely spoken of the Slavic languages
*''The Russians'', a b ...
as established by parallel treaties between the
Russian Empire
The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about , roughl ...
and the United States (1824) and Britain (1825). However, after the outbreak of the
Mexican–American War
The Mexican–American War (Spanish language, Spanish: ''guerra de Estados Unidos-México, guerra mexicano-estadounidense''), also known in the United States as the Mexican War, and in Mexico as the United States intervention in Mexico, ...
in April 1846 diverted U.S. attention and military resources, a compromise was reached in the ongoing negotiations in Washington, D.C., and the matter was then settled by the Polk administration (to the surprise of its own party's hardliners) to avoid a two-war situation, and another war with the formidable military strength of the United Kingdom.
Senate vote in June 1846
In early June 1846, the British offered to negotiate the boundaries between the United States and British North America in the region west of the Rockies. Some US senators such as
Charles Gordon Atherton and
Benning Wentworth Jenness were combative and were in favor of rejecting British proposals to negotiate. However, others, such as both Alabama senators (
Arthur P. Bagby and
Dixon Hall Lewis) as well as both Massachusetts senators (
Daniel Webster and
John Davis) were in favor of accepting British proposals. The Senate agreed that they would vote on whether or not to recommend President Polk accept British offers to negotiate. Watching closely, the British hoped this vote would pass the Senate. On June 12, the Senate voted 38–12 recommending that President Polk accept British proposals to negotiate this boundary. Votes in favor included 18 Democrats and 20 Whigs, whereas 11 Democrats and one Whig voted against. Three Democrats and three Whigs abstained.
Negotiations
The treaty was negotiated by US Secretary of State and future President
James Buchanan
James Buchanan Jr. ( ; April 23, 1791June 1, 1868) was the 15th president of the United States, serving from 1857 to 1861. He also served as the United States Secretary of State, secretary of state from 1845 to 1849 and represented Pennsylvan ...
and
Richard Pakenham, British envoy to the United States. Foreign Secretary
Earl of Aberdeen was responsible for it in Parliament. The treaty was signed on June 15, 1846, ending the joint occupation and making Oregonians south of the 49th parallel American citizens, with those north of it becoming British.
The Oregon Treaty set the border between the U.S. and
British North America
British North America comprised the colonial territories of the British Empire in North America from 1783 onwards. English colonisation of North America began in the 16th century in Newfoundland, then further south at Roanoke and Jamestown, ...
at the
49th parallel except
Vancouver Island
Vancouver Island is an island in the northeastern Pacific Ocean and part of the Canadian province of British Columbia. The island is in length, in width at its widest point, and in total area, while are of land. The island is the largest ...
, which was retained in its entirety by the British. Vancouver Island, with all coastal islands, was constituted as the
Colony of Vancouver Island in 1849. The U.S. portion of the region was organized as
Oregon Territory
The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14, 1848, until February 14, 1859, when the southwestern portion of the territory was admitted to the United States, Union as the Oreg ...
on August 15, 1848, with
Washington Territory
The Washington Territory was an organized incorporated territory of the United States that existed from March 2, 1853, until November 11, 1889, when the territory was admitted to the Union as the State of Washington. It was created from the ...
being formed from it in 1853. The British portion remained unorganized until 1858 when the
Colony of British Columbia The Colony of British Columbia refers to one of two colonies of British North America, located on the Pacific coast of modern-day Canada:
* Colony of British Columbia (1858–1866)
* Colony of British Columbia (1866–1871)
See also
* History of ...
was set up as a result of the
Fraser Canyon Gold Rush and fears of the re-asserted American expansionist intentions. The two British colonies were amalgamated in 1866 as the
Colony of British Columbia The Colony of British Columbia refers to one of two colonies of British North America, located on the Pacific coast of modern-day Canada:
* Colony of British Columbia (1858–1866)
* Colony of British Columbia (1866–1871)
See also
* History of ...
. When the Colony of British Columbia joined Canada in 1871, the 49th parallel and marine boundaries established by the Oregon Treaty became the
Canada–US border.
To ensure that Britain retained all of
Vancouver Island
Vancouver Island is an island in the northeastern Pacific Ocean and part of the Canadian province of British Columbia. The island is in length, in width at its widest point, and in total area, while are of land. The island is the largest ...
and the southern Gulf Islands, it was agreed that the border would swing south around that area. Ownership of several channel islands, including the
San Juan Islands
The San Juan Islands is an archipelago in the Pacific Northwest of the United States between the U.S. state of Washington and Vancouver Island, British Columbia, Canada. The San Juan Islands are part of Washington state, and form the core of ...
remained in dispute. A bloodless confrontation known as the
Pig War erupted in 1859 over ownership of the San Juans, which was not resolved until 1872. Ultimately, arbitration began with German Emperor
Wilhelm I
Wilhelm I (Wilhelm Friedrich Ludwig; 22 March 1797 – 9 March 1888) was King of Prussia from 1861 and German Emperor from 1871 until his death in 1888. A member of the House of Hohenzollern, he was the first head of state of a united Germany. ...
as head of a three-man arbitration commission. On October 21, 1872, the commission decided in favor of the United States, awarding the San Juan Islands to the U.S.
Treaty definitions
The treaty states that the border in the
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 main outlet to the Pacific Ocean. The Canada–United States border, international boundary between Canada and the ...
would follow “the middle of the channel which separates the continent from Vancouver's Island.” It did not, however, specify which of several possible channels was intended, giving rise to
ownership disputes over the
San Juan Islands
The San Juan Islands is an archipelago in the Pacific Northwest of the United States between the U.S. state of Washington and Vancouver Island, British Columbia, Canada. The San Juan Islands are part of Washington state, and form the core of ...
beginning in 1859.
Other provisions included:
* Navigation of "channel
and straits, south of the forty-ninth parallel of north latitude, remain free and open to both parties".
* The "
Puget's Sound Agricultural Company" (a subsidiary of the Hudson's Bay Company) retains the right to their property north of the
Columbia River
The Columbia River (Upper Chinook language, Upper Chinook: ' or '; Sahaptin language, Sahaptin: ''Nch’i-Wàna'' or ''Nchi wana''; Sinixt dialect'' '') is the largest river in the Pacific Northwest region of North America. The river headwater ...
and shall be compensated for properties surrendered if required by the United States.
* The property rights of the
Hudson's Bay Company
The Hudson's Bay Company (HBC), originally the Governor and Company of Adventurers of England Trading Into Hudson’s Bay, is a Canadian holding company of department stores, and the oldest corporation in North America. It was the owner of the ...
and all
British subjects south of the new boundary will be respected.
Issues arising from treaty

Ambiguities in the wording of the Oregon Treaty regarding the route of the boundary, which was to follow "the deepest channel" out to the Strait of Juan de Fuca and beyond to the open ocean, resulted in the
Pig War, another boundary dispute in 1859 over the
San Juan Islands
The San Juan Islands is an archipelago in the Pacific Northwest of the United States between the U.S. state of Washington and Vancouver Island, British Columbia, Canada. The San Juan Islands are part of Washington state, and form the core of ...
. The dispute was peacefully resolved after a decade of confrontation and military bluster during which the local British authorities consistently lobbied London to seize back the Puget Sound region entirely, as the Americans were busy elsewhere with the Civil War.
The San Juans dispute was not resolved until 1872 when, under the 1871
Treaty of Washington, an arbitrator (
William I, German Emperor) chose the American-preferred marine boundary via
Haro Strait, to the west of the islands, over the British preference for
Rosario Strait which lay to their east.
The treaty also had the unintended consequence of putting what became
Point Roberts, Washington
Point Roberts is a Enclave and exclave#"Practical" enclaves, exclaves and inaccessible districts, pene-exclave of the US state of Washington (state), Washington on the southernmost tip of the Tsawwassen, British Columbia, Tsawwassen peninsula, s ...
on the "wrong" side of the border. A peninsula, jutting south from Canada into
Boundary Bay, was made by the agreement, as land south of the 49th parallel, a separate fragment of the United States.
According to American historian Thomas C. McClintock, the British public welcomed the treaty:
See also
*
Joseph Smith Harris' account of surveying the border
*
Presidency of James K. Polk
*
United Kingdom–United States relations
United may refer to:
Places
* United, Pennsylvania, an unincorporated community
* United, West Virginia, an unincorporated community
Arts and entertainment Films
* ''United'' (2003 film), a Norwegian film
* ''United'' (2011 film), a BBC Two f ...
*
Webster-Ashburton Treaty
Notes
References
Bibliography
* Anderson, Stuart. "British Threats and the Settlement of the Oregon Boundary Dispute." ''Pacific Northwest Quarterly'' 66#4 (1975): 153–160
online*
* Cramer, Richard S. "British magazines and the Oregon question." ''Pacific Historical Review'' 32.4 (1963): 369–382
online* Dykstra, David L. ''The Shifting Balance of Power: American-British Diplomacy in North America, 1842-1848'' (University Press of America, 1999).
* Jones, Wilbur D., and J. Chal Vinson. “British Preparedness and the Oregon Settlement.” ''Pacific Historical Review'' 22#4 (1953): 353–364
online* Levirs, Franklin P. "The British attitude to the Oregon question, 1846." (Diss. University of British Columbia, 1931
online
* Miles, Edwin A. “'Fifty-four Forty or Fight' – An American Political Legend.” ''Mississippi Valley Historical Review'' 44#2 (1957): 291–309
online* Merk, Frederick. “The British Corn Crisis of 1845-46 and the Oregon Treaty.” ''Agricultural History'' 8#3 (1934): 95–123.
* Merk, Frederick. “British Government Propaganda and the Oregon Treaty.” ''American Historical Review'' 40#1 (1934): 38-6
online* Pletcher, David M. ''The Diplomacy of Annexation: Texas, Oregon, and the Mexican War.'' (U of Missouri Press, 1973), a standard scholarly history
* Rakestraw, Donald A. ''For Honor or Destiny: The Anglo-American Crisis over the Oregon Territory'' (Peter Lang Publishing, 1995), a standard scholarly history.
* Winther, Oscar Osburn. "The British in Oregon Country: A Triptych View." The ''Pacific Northwest Quarterly'' 58.4 (1967): 179–187
online
External links
Map of North America at time of Oregon Treaty at omniatlas.com
{{Authority control
1846 in Washington, D.C.
1846 in British law
1846 in American law
1846 treaties
June 1846
Canada–United States border
History of the Pacific Northwest
Pre-Confederation British Columbia
Legal history of Canada
Pre-statehood history of Oregon
Oregon Country
United Kingdom–United States treaties
Treaties of the United Kingdom (1801–1922)
George Hamilton-Gordon, 4th Earl of Aberdeen
James Buchanan