Outline of Oregon territorial evolution

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 (extralegal), 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 (extralegal), 1849–1850
 * State of Oregon since 1859
 * Oregon Statehood Act, February 14, 1859 (Eastern portion of territory transferred to Territory of Washington)