Outline of Oregon territorial evolution

Legend for maps The following outline traces the territorial evolution of the U.S. state of Oregon.

An enlargeable map of the United States after the Treaty of Paris in 1789
An enlargeable map of the United States after the Anglo-American Convention of 1818
An enlargeable map of the United States after the Adams-Onís Treaty took effect in 1821
An enlargeable map of the United States after the Oregon Treaty of 1846
An enlargeable map of the United States after the Oregon Organic Act in 1848
An enlargeable map of the United States after Oregon Statehood in 1859
An enlargeable map of the United States as it has been since 1959