Outline of Washington territorial evolution
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![](/w/images/thumb/f/f3/United_States_1789-03-1789-08.png/240px-United_States_1789-03-1789-08.png)
An enlargeable map of the United States after the Treaty of Paris in 1789
![](/w/images/thumb/3/3c/United_States_1818-10-1818-12.png/240px-United_States_1818-10-1818-12.png)
An enlargeable map of the United States after the Anglo-American Convention of 1818
![](/w/images/thumb/a/a6/United_States_1846-06-1846-12.png/240px-United_States_1846-06-1846-12.png)
An enlargeable map of the United States after the Oregon Treaty of 1846
The following outline traces the territorial evolution of the U.S. State of Washington.
Contents
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
- Oregon Country, 1818-1846
- 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[1]
- State of Washington since 1889[2]