Oregon Treaty

United States [1846]

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June 22, 2026

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The Oregon Treaty of 1846 established the boundary between the United States and British North America along the 49th parallel. This agreement resolved a long-standing dispute over the Oregon Country, a vast territory in the Pacific Northwest. The treaty brought an end to joint occupation and secured U.S. control over the land that would eventually become the state of Oregon, as well as Washington and parts of Idaho. This diplomatic success was a significant step in the westward expansion of the United States.12

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James K. Polk
Presidency of James K. Polk
…had been inflamed over the Oregon compromise of 1846. As these measures helped foreign trade, so the reenactment of the independent treasury system in 1846 helped in the solution of domestic financial problems.
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…had been inflamed over the Oregon compromise of 1846. As these measures helped foreign trade, so the reenactment of the independent treasury system in 1846 helped in the solution of domestic financial problems.
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John Quincy Adams
Secretary of state of John Quincy Adams
Polk’s Oregon treaty of 1846 drew that boundary along the line of 49°. The Monroe Doctrine rightly bears the name of the president who in 1823 assumed the responsibility for its promulgation, but its formulation was the work of John Quincy Adams more than of any…
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Polk’s Oregon treaty of 1846 drew that boundary along the line of 49°. The Monroe Doctrine rightly bears the name of the president who in 1823 assumed the responsibility for its promulgation, but its formulation was the work of John Quincy Adams more than of any…
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