Outline of Washington territorial evolution

An enlargeable map of the United States after the Treaty of Paris in 1789

An enlargeable map of the United States after the Anglo-American Convention of 1818

An enlargeable map of the United States after the Oregon Treaty of 1846

An enlargeable map of the United States after the Washington Organic Act in 1853

An enlargeable map of the United States after Washington Statehood in 1889

An enlargeable map of the United States as it has been since 1959

The following outline traces the territorial evolution of the U.S. State of Washington.

Outline

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v t e Territorial evolution of the world
By country	Australia Canada China Ethiopia France Germany Greece India Mexico Norway Poland Romania Russia Switzerland United Kingdom United States (acquisitions)
By former country	British Empire Confederate States Mongol Empire Ottoman Empire
By subdivision	United States (Arizona California Colorado Idaho Montana Nevada New Mexico North Dakota Oregon South Dakota Utah Washington Wyoming)
By region	Baltic states Caribbean North America (Prior to 1763 Since 1763)
By country, people, region or period	Burgundian and Habsburg in the Low Countries German in Central and Eastern Europe Russia (1500–1800) Vietnam (11th–19th century)
By international organisation	African Union Association of Southeast Asian Nations European Union Eurasian Economic Union North Atlantic Treaty Organization United Nations
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