Outline of Washington territorial evolution
Overview of and topical guide to Washington territorial evolution
From Wikipedia, the free encyclopedia
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
- 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]