The Oregon Treaty extends the border between the United States and British North America, established by the Treaty of 1818, westward to the Pacific Ocean.

The Oregon Treaty was a treaty between the United Kingdom and the United States 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 through partition. The area had been jointly occupied by both Britain and the U.S. since the Treaty of 1818.