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Washington Territory

Territory of Washington
Organized incorporated territory of the United States

1853–1889
 

 

Seal of Washington Territory of Washington Territory

Seal of Washington Territory

Capital Olympia
Government Organized incorporated territory
Governor List
History
 •  Split from Oregon Territory March 2, 1853
 •  Idaho Territory split off March 4, 1863
 •  Statehood November 11, 1889

Seal of Washington Territory of Washington Territory

Seal of Washington Territory

The Territory of Washington was an organized incorporated territory of the United States that existed from March 2, 1853, until November 11, 1889, when the territory was admitted to the Union as the State of Washington. It was created from the portion of the Oregon Territory north of the lower Columbia River and north of the 46th parallel east of the Columbia. At its largest extent, it also included the entirety of modern Idaho and parts of Montana and Wyoming, before attaining its final boundaries in 1863.

Agitation in favor of self-government developed in the regions of the Oregon Territory north of the Columbia River in 1851–1852. A group of prominent settlers from the Cowlitz and Puget Sound regions met on November 25, 1852, at the "Monticello Convention" in present-day Longview, to draft a petition to the United States Congress calling for a separate territory north of the Columbia River. After gaining approval from the Oregon territorial government, the proposal was sent to the federal government.


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