Outline of Oregon territorial evolution

[image:United States 1789-03-1789-08.png|thumb|An enlargeable map of the United States after the Treaty of Paris in 1789]
The following outline traces the territorial evolution of the U.S. state of Oregon.

Outline

Historical territorial claims of Spain in the present state of Oregon:
*Nueva California, 1768–1804
*Gran Cuenca, 1776–1821
*Alta California, 1804–1821
*Adams-Onis Treaty of 1819
Historical international territory in the present state of Oregon:
*Oregon Country, 1818–1846
**Anglo-American Convention of 1818
**Provisional Government of Oregon, 1843–1849
**Oregon Treaty of 1846
Historical political divisions of the United States in the present state of Oregon:
*Unorganized territory created by the Oregon Treaty, 1846–1848
*Territory of Oregon, 1848–1859
**Oregon Organic Act, August 14, 1848
**Northern portion of Oregon Territory incorporated in new Washington Territory, March 2, 1853
*State of Deseret, 1849–1850
*State of Oregon since 1859
**Oregon Statehood Act, February 14, 1859