The following outline traces the territorial evolution of the U.S. State of Washington.
Outline Historical international territory in the present State of Washington: 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 Washington: Unorganized territory created by the Oregon Treaty, 1846-1848 Territory of Oregon, 1848-1859 Territory of Washington, 1853-1889 State of Washington since 1889
See also Historical outline of Washington History of Washington (state) Territorial evolution of the United States Territorial evolution of Idaho Territorial evolution of Oregon
References
External links State of Washington website Washington Secretary of State History website Washington Historical Society Washington State History