Outline of Oregon territorial evolution

{{Short description|1=Overview of and topical guide to Oregon territorial evolution}}

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The following outline traces the territorial evolution of the U.S. state of Oregon.

Outline

Historical territorial claims of Spain in the present state of Oregon:
Nueva California, 1768–1804
Gran Cuenca, 1776–1821
Alta California, 1804–1821
Adams-Onis Treaty of 1819
Historical international territory in the present state of Oregon:
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 Oregon:
Unorganized territory created by the Oregon Treaty, 1846–1848
Territory of Oregon, 1848–1859
Oregon Organic Act, August 14, 1848{{cite web|date=August 14, 1848|url=http://memory.loc.gov/cgi-bin/ampage?collId=llsl&fileName=009/llsl009.db&recNum=350|title = An Act to establish the Territorial Government of Oregon|format=cgi-bin|author=Thirtieth United States Congress|accessdate=June 5, 2009}}
Northern portion of Oregon Territory incorporated in new Washington Territory, March 2, 1853
State of Deseret (extralegal), 1849–1850
State of Oregon since 1859
Oregon Statehood Act, February 14, 1859{{cite web|date=February 14, 1859|url=http://memory.loc.gov/cgi-bin/ampage?collId=llsl&fileName=011/llsl011.db&recNum=404|title = An Act for the Admission of Oregon into the Union|format=cgi-bin|author=Thirty-fifth United States Congress|accessdate=June 5, 2009}} (Eastern portion of territory transferred to Territory of Washington)

[http://www.oregon.gov/ State of Oregon website]
[https://sos.oregon.gov/blue-book/Pages/facts-history.aspx Oregon Blue Book: Oregon History]
[http://www.ohs.org/ Oregon Historical Society]
[http://www.ohs.org/education/oregonhistory/ Oregon History Project]