Oregon County Creation Dates and Parent Counties: Difference between revisions

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''[[United States]] [[Image:Gotoarrow.png]] [[Oregon]] [[Image:Gotoarrow.png]] '''County Creation Dates'''''  
{{Note|See an interactive outline map of [http://historical-county.newberry.org/website/Oregon/viewer.htm ''Oregon Historical Counties''] at Newberry Library site<ref>[http://historical-county.newberry.org/website/Oregon/viewer.htm ''Oregon Atlas of Historical County Boundaries'', John H. Long, Editor; Peggy Tuck Sinko, Associate Editor; Gordon DenBoer, Historical Compiler; Douglas Knox, Book Digitizing Director and Digital Compiler; Emily Kelley, Research Associate; Laura Rico-Beck, GIS Specialist; Peter Siczewicz, ArcIMS Interactive Map Designer; Robert Will, Cartographic Assistant. Copyright The Newberry Library 2008.</ref> (Free) Enter a year, '''Refresh Map''', select '''zoom in''', then click on the map to enlarge it.}}
 
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{| border="1"
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{{Tip|Sort the table by '''Date Formed''' or by '''Parent Counties''' and check [http://historical-county.newberry.org/website/Oregon/documents/OR_County_Index.htm Boundary Changes] for interesting insights.}}
{| border="1" width="120%" class="sortable"
|-
|-
| align="center" style="background-color: rgb(240, 240, 240); background-image: none; background-repeat: repeat; background-attachment: scroll; background-position: 0% 0%; -moz-background-size: auto auto; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Name of County'''  
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Name of County'''  
| align="center" style="background-color: rgb(240, 240, 240); background-image: none; background-repeat: repeat; background-attachment: scroll; background-position: 0% 0%; -moz-background-size: auto auto; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Date Formed'''  
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Date Formed'''  
| align="center" style="background-color: rgb(240, 240, 240); background-image: none; background-repeat: repeat; background-attachment: scroll; background-position: 0% 0%; -moz-background-size: auto auto; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Parent County'''  
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" |'''Boundary<br>Changes'''
| align="center" style="background-color: rgb(240, 240, 240); background-image: none; background-repeat: repeat; background-attachment: scroll; background-position: 0% 0%; -moz-background-size: auto auto; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Progeny County'''
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Parent County'''  
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Counties Created by Boundary Changes'''
|-
|-
| [[Baker County, Oregon|Baker]]  
| [[Baker County, Oregon|Baker]]  
| nowrap="nowrap" | 22 Sep 1862
| 1862  Sep 22
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#BAKER Details]
| [[Wasco County, Oregon|Wasco]]  
| [[Wasco County, Oregon|Wasco]]  
| [[Malheur County, Oregon|Malheur]] 1887, [[Union County, Oregon|Union]] 1864
| [[Malheur County, Oregon|Malheur]] 1887, [[Union County, Oregon|Union]] 1864
|-
|-
| [[Benton County, Oregon|Benton]]  
| [[Benton County, Oregon|Benton]]  
| 23 Dec 1847
| 1847  Dec 23  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#BENTON Details]
| [[Polk County, Oregon|Polk]]  
| [[Polk County, Oregon|Polk]]  
| [[Lincoln County, Oregon|Lincoln]] 1893, [[Umpqua County, Oregon|Umpqua]] 1851
| [[Lincoln County, Oregon|Lincoln]] 1893, [[Umpqua County, Oregon|Umpqua]] 1851
|-
|-
| [[Champoeg County, Oregon|Champoeg]]  
| [[Champoeg County, Oregon|Champoeg]]  
| 05 Jul 1843
| 1843  Jul 05  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#CHAMPOEG Details]
| [[Oregon Country|Oregon Country]]  
| [[Oregon Country|Oregon Country]]  
| [[Linn County, Oregon|Linn]] 1847, renamed [[Marion County, Oregon|Marion]] 1849
| [[Linn County, Oregon|Linn]] 1847, renamed [[Marion County, Oregon|Marion]] 1849
|-
|-
| [[Clackamas County, Oregon|Clackamas]]  
| [[Clackamas County, Oregon|Clackamas]]  
| 05 Jul 1843
| 1843  Jul 05  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#CLACKAMAS Details]
| [[Oregon Country|Oregon Country]]  
| [[Oregon Country|Oregon Country]]  
| [[Multnomah County, Oregon|Multnomah]] 1854, [[Wasco County, Oregon|Wasco]] 1854
| [[Multnomah County, Oregon|Multnomah]] 1854, [[Wasco County, Oregon|Wasco]] 1854
|-
|-
| [[Clark County, Washington|Clark]]  
| [[Clark County, Washington|Clark]]  
| 05 Jul 1843
| 1843  Jul 05  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#CLARK Details]
| [[Oregon Country|Oregon Country]]  
| [[Oregon Country|Oregon Country]]  
| now in [[Washington|Washington]] State
| now in [[Washington|Washington]] State
|-
|-
| [[Clatsop County, Oregon|Clatsop]]  
| [[Clatsop County, Oregon|Clatsop]]  
| 22 Jun 1844
| 1844  Jun 22  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#CLATSOP Details]
| [[Twality County, Oregon|Twality]]  
| [[Twality County, Oregon|Twality]]  
| [[Tillamook County, Oregon|Tillamook]] 1853
| [[Tillamook County, Oregon|Tillamook]] 1853
|-
|-
| [[Columbia County, Oregon|Columbia]]  
| [[Columbia County, Oregon|Columbia]]  
| 16 Jan 1854
| 1854  Jan 16  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#COLUMBIA Details]
| [[Washington County, Oregon|Washington]]  
| [[Washington County, Oregon|Washington]]  
| none
| none
|-
|-
| [[Coos County, Oregon|Coos]]  
| [[Coos County, Oregon|Coos]]  
| 22 Dec 1853
| 1853  Dec 22  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#COOS Details]
| [[Umpqua County, Oregon|Umpqua]], [[Jackson County, Oregon|Jackson]]  
| [[Umpqua County, Oregon|Umpqua]], [[Jackson County, Oregon|Jackson]]  
| [[Curry County, Oregon|Curry]] 1855
| [[Curry County, Oregon|Curry]] 1855
|-
|-
| [[Crook County, Oregon|Crook]]  
| [[Crook County, Oregon|Crook]]  
| 24 Oct 1882
| 1882  Oct 24  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#CROOK Details]
| [[Wasco County, Oregon|Wasco]]  
| [[Wasco County, Oregon|Wasco]]  
| [[Deschutes County, Oregon|Deschutes]] 1916, [[Trivia Tidbits, Jefferson County, Oregon|Jefferson]] 1914, [[Wheeler County, Oregon|Wheeler]] 1899
| [[Deschutes County, Oregon|Deschutes]] 1916, [[Trivia Tidbits, Jefferson County, Oregon|Jefferson]] 1914, [[Wheeler County, Oregon|Wheeler]] 1899
|-
|-
| [[Curry County, Oregon|Curry]]  
| [[Curry County, Oregon|Curry]]  
| 18 dec 1855
| 1855  dec 18  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#CURRY Details]
| [[Coos County, Oregon|Coos]]  
| [[Coos County, Oregon|Coos]]  
| none
| none
|-
|-
| [[Deschutes County, Oregon|Deschutes]]  
| [[Deschutes County, Oregon|Deschutes]]  
| 13 Dec 1916
| 1916  Dec 13  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#DESCHUTES Details]
| [[Crook County, Oregon|Crook]]  
| [[Crook County, Oregon|Crook]]  
| none
| none
|-
|-
| [[Douglas County, Oregon|Douglas]]  
| [[Douglas County, Oregon|Douglas]]  
| 07 Jan 1852
| 1852  Jan 07  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#DOUGLAS Details]
| [[Umpqua County, Oregon|Umpqua]]  
| [[Umpqua County, Oregon|Umpqua]]  
| [[Wasco County, Oregon|Wasco]] 1854
| [[Wasco County, Oregon|Wasco]] 1854
|-
|-
| [[Gilliam County, Oregon|Gilliam]]  
| [[Gilliam County, Oregon|Gilliam]]  
| 25 Feb 1885
| 1885  Feb 25  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#GILLIAM Details]
| [[Wasco County, Oregon|Wasco]]  
| [[Wasco County, Oregon|Wasco]]  
| [[Wheeler County, Oregon|Wheeler]] 1899
| [[Wheeler County, Oregon|Wheeler]] 1899
|-
|-
| [[Grant County, Oregon|Grant]]  
| [[Grant County, Oregon|Grant]]  
| 14 Oct 1864
| 1864  Oct 14  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#GRANT Details]
| [[Wasco County, Oregon|Wasco]], [[Umatilla County, Oregon|Umatilla]]  
| [[Wasco County, Oregon|Wasco]], [[Umatilla County, Oregon|Umatilla]]  
| [[Harney County, Oregon|Harney]] 1889, [[Wheeler County, Oregon|Wheeler]] 1899
| [[Harney County, Oregon|Harney]] 1889, [[Wheeler County, Oregon|Wheeler]] 1899
|-
|-
| [[Harney County, Oregon|Harney]]  
| [[Harney County, Oregon|Harney]]  
| 23 Feb1 889
| 889  Feb 23  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#HARNEY Details]
| [[Grant County, Oregon|Grant]]  
| [[Grant County, Oregon|Grant]]  
| none
| none
|-
|-
| [[Hood River County, Oregon|Hood River]]  
| [[Hood River County, Oregon|Hood River]]  
| 23 Jun 1908
| 1908  Jun 23  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#HOOD%20RIVER Details]
| [[Wasco County, Oregon|Wasco]]  
| [[Wasco County, Oregon|Wasco]]  
| none
| none
|-
|-
| [[Jackson County, Oregon|Jackson]]  
| [[Jackson County, Oregon|Jackson]]  
| 12 Jan 1852
| 1852  Jan 12  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#JACKSON Details]
| [[Umpqua County, Oregon|Umpqua]]  
| [[Umpqua County, Oregon|Umpqua]]  
| [[Coos County, Oregon|Coos]] 1853, [[Josephine County, Oregon|Josephine]] 1856, [[Lake County, Oregon|Lake]] 1874, [[Wasco County, Oregon|Wasco]] 1854
| [[Coos County, Oregon|Coos]] 1853, [[Josephine County, Oregon|Josephine]] 1856, [[Lake County, Oregon|Lake]] 1874, [[Wasco County, Oregon|Wasco]] 1854
|-
|-
| [[Jefferson County, Oregon|Jefferson]]  
| [[Jefferson County, Oregon|Jefferson]]  
| 12 Dec 1914
| 1914  Dec 12  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#JEFFERSON Details]
| [[Crook County, Oregon|Crook]]  
| [[Crook County, Oregon|Crook]]  
| none
| none
|-
|-
| [[Josephine County, Oregon|Josephine]]  
| [[Josephine County, Oregon|Josephine]]  
| 22 Jan 1856
| 1856  Jan 22  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#JOSEPHINE Details]
| [[Jackson County, Oregon|Jackson]]  
| [[Jackson County, Oregon|Jackson]]  
| none
| none
|-
|-
| [[Klamath County, Oregon|Klamath]]  
| [[Klamath County, Oregon|Klamath]]  
| 17 Oct 1882
| 1882  Oct 17  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#KLAMATH Details]
| [[Lake County, Oregon|Lake]]  
| [[Lake County, Oregon|Lake]]  
| none
| none
|-
|-
| [[Lake County, Oregon|Lake]]  
| [[Lake County, Oregon|Lake]]  
| 24 Oct 1874
| 1874  Oct 24  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#LAKE Details]
| [[Jackson County, Oregon|Jackson]], [[Wasco County, Oregon|Wasco]]  
| [[Jackson County, Oregon|Jackson]], [[Wasco County, Oregon|Wasco]]  
| [[Klamath County, Oregon|Klamath]] 1882
| [[Klamath County, Oregon|Klamath]] 1882
|-
|-
| [[Lane County, Oregon|Lane]]  
| [[Lane County, Oregon|Lane]]  
| 28 Jan 1851
| 1851  Jan 28  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#LANE Details]
| [[Linn County, Oregon|Linn]], [[Umpqua County, Oregon|Umpqua]]  
| [[Linn County, Oregon|Linn]], [[Umpqua County, Oregon|Umpqua]]  
| [[Wasco County, Oregon|Wasco]] 1854
| [[Wasco County, Oregon|Wasco]] 1854
|-
|-
| [[Lewis County, Washington|Lewis]]  
| [[Lewis County, Washington|Lewis]]  
| 09 Dec 1845
| 1845  Dec 09  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#LEWIS Details]
| [[Oregon Country|Oregon Country]]  
| [[Oregon Country|Oregon Country]]  
| now in [[Washington|Washington]] State
| now in [[Washington|Washington]] State
|-
|-
| [[Lincoln County, Oregon|Lincoln]]  
| [[Lincoln County, Oregon|Lincoln]]  
| 20 Feb 1893
| 1893  Feb 20  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#LINCOLN Details]
| [[Benton County, Oregon|Benton]], [[Polk County, Oregon|Polk]]  
| [[Benton County, Oregon|Benton]], [[Polk County, Oregon|Polk]]  
| none
| none
|-
|-
| [[Linn County, Oregon|Linn]]  
| [[Linn County, Oregon|Linn]]  
| 28 Dec 1847
| 1847  Dec 28  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#LINN Details]
| [[Champoeg County, Oregon|Champoeg]]  
| [[Champoeg County, Oregon|Champoeg]]  
| [[Lane County, Oregon|Lane]] 1851, [[Umpqua County, Oregon|Umpqua]] 1851, [[Wasco County, Oregon|Wasco]] 1854
| [[Lane County, Oregon|Lane]] 1851, [[Umpqua County, Oregon|Umpqua]] 1851, [[Wasco County, Oregon|Wasco]] 1854
|-
|-
| [[Malheur County, Oregon|Malheur]]  
| [[Malheur County, Oregon|Malheur]]  
| 17 Feb 1887
| 1887  Feb 17  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#MALHEUR Details]
| [[Baker County, Oregon|Baker]]  
| [[Baker County, Oregon|Baker]]  
| none
| none
|-
|-
| [[Marion County, Oregon|Marion]]  
| [[Marion County, Oregon|Marion]]  
| 03 Sep 1849
| 1849  Sep 03  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#MARION Details]
| renamed from [[Champoeg County, Oregon|Champoeg]]  
| renamed from [[Champoeg County, Oregon|Champoeg]]  
| [[Wasco County, Oregon|Wasco]] 1854
| [[Wasco County, Oregon|Wasco]] 1854
|-
|-
| [[Morrow County, Ohio|Morrow]]  
| [[Morrow County, Ohio|Morrow]]  
| 16 Feb 1885
| 1885  Feb 16  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#MORROW Details]
| [[Umatilla County, Oregon|Umatilla]]  
| [[Umatilla County, Oregon|Umatilla]]  
| none
| none
|-
|-
| [[Multnomah County, Oregon|Multnomah]]  
| [[Multnomah County, Oregon|Multnomah]]  
| 22 Dec 1854
| 1854  Dec 22  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#MULTNOMAH Details]
| [[Washington County, Oregon|Washington]], [[Clackamas County, Oregon|Clackamas]]  
| [[Washington County, Oregon|Washington]], [[Clackamas County, Oregon|Clackamas]]  
| none
| none
|-
|-
| [[Polk County, Oregon|Polk]]  
| [[Polk County, Oregon|Polk]]  
| 22 Dec 1845
| 1845  Dec 22  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#POLK Details]
| [[Yamhill County, Oregon|Yamhill]]  
| [[Yamhill County, Oregon|Yamhill]]  
| [[Benton County, Oregon|Benton]] 1847, [[Lincoln County, Oregon|Lincoln]] 1893, [[Tillamook County, Oregon|Tillamook]] 1853
| [[Benton County, Oregon|Benton]] 1847, [[Lincoln County, Oregon|Lincoln]] 1893, [[Tillamook County, Oregon|Tillamook]] 1853
|-
|-
| [[Sherman County, Oregon|Sherman]]  
| [[Sherman County, Oregon|Sherman]]  
| 25 Feb 1889
| 1889  Feb 25  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#SHERMAN Details]
| [[Wasco County, Oregon|Wasco]]  
| [[Wasco County, Oregon|Wasco]]  
| none
| none
|-
|-
| [[Tillamook County, Oregon|Tillamook]]  
| [[Tillamook County, Oregon|Tillamook]]  
| 15 Dec 1853
| 1853  Dec 15  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#TILLAMOOK Details]
| [[Clatsop County, Oregon|Clatsop]], [[Polk County, Oregon|Polk]], [[Yamhill County, Oregon|Yamhill]]  
| [[Clatsop County, Oregon|Clatsop]], [[Polk County, Oregon|Polk]], [[Yamhill County, Oregon|Yamhill]]  
| none
| none
|-
|-
| [[Twality County, Oregon|Twality]]  
| [[Twality County, Oregon|Twality]]  
| 05 Jul 1843
| 1843  Jul 05  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#TWALITY Details]
| [[Oregon Country|Oregon Country]]  
| [[Oregon Country|Oregon Country]]  
| renamed [[Washington County, Oregon|Washington]] 1845
| renamed [[Washington County, Oregon|Washington]] 1845
|-
|-
| [[Umatilla County, Oregon|Umatilla]]  
| [[Umatilla County, Oregon|Umatilla]]  
| 27 Sep 1862
| 1862  Sep 27  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#UMATILLA Details]
| [[Wasco County, Oregon|Wasco]]  
| [[Wasco County, Oregon|Wasco]]  
| [[Grant County, Oregon|Grant]] 1864, [[Morrow County, Oregon|Morrow]] 1885
| [[Grant County, Oregon|Grant]] 1864, [[Morrow County, Oregon|Morrow]] 1885
|-
|-
| [[Umpqua County, Oregon|Umpqua]]  
| [[Umpqua County, Oregon|Umpqua]]  
| 28 Jan 1851
| 1851  Jan 28  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#UMPQUA Details]
| [[Benton County, Oregon|Benton]], [[Linn County, Oregon|Linn]]  
| [[Benton County, Oregon|Benton]], [[Linn County, Oregon|Linn]]  
| [[Coos County, Oregon|Coos]] 1853, [[Douglas County, Oregon|Douglas]] 1852, [[Jackson County, Oregon|Jackson]] 1852, [[Lane County, Oregon|Lane]] 1851, dissolved into [[Douglas County, Oregon|Douglas]] 1863
| [[Coos County, Oregon|Coos]] 1853, [[Douglas County, Oregon|Douglas]] 1852, [[Jackson County, Oregon|Jackson]] 1852, [[Lane County, Oregon|Lane]] 1851, dissolved into [[Douglas County, Oregon|Douglas]] 1863
|-
|-
| [[Union County, Oregon|Union]]  
| [[Union County, Oregon|Union]]  
| 14 Oct 1864
| 1864  Oct 14  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#UNION Details]
| [[Baker County, Oregon|Baker]]  
| [[Baker County, Oregon|Baker]]  
| [[Wallowa County, Oregon|Wallowa]] 1887, [[Baker County, Oregon|Baker]] 1901
| [[Wallowa County, Oregon|Wallowa]] 1887, [[Baker County, Oregon|Baker]] 1901
|-
|-
| [[Wallowa County, Oregon|Wallowa]]  
| [[Wallowa County, Oregon|Wallowa]]  
| 11 Feb 1887
| 1887  Feb 11  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#WALLOWA Details]
| [[Union County, Oregon|Union]]  
| [[Union County, Oregon|Union]]  
| none
| none
|-
|-
| [[Wasco County, Oregon|Wasco]]  
| [[Wasco County, Oregon|Wasco]]  
| 11 Jan 1854
| 1854  Jan 11  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#WASCO Details]
| [[Clackamas County, Oregon|Clackamas]], [[Marion County, Oregon|Marion]], [[Linn County, Oregon|Linn]], [[Lane County, Oregon|Lane]], [[Douglas County, Oregon|Douglas]], [[Lewis County, Washington]], [[Clark County, Washington]] (entire area east of Cascades)  
| [[Clackamas County, Oregon|Clackamas]], [[Marion County, Oregon|Marion]], [[Linn County, Oregon|Linn]], [[Lane County, Oregon|Lane]], [[Douglas County, Oregon|Douglas]], [[Lewis County, Washington]], [[Clark County, Washington]] (entire area east of Cascades)  
| [[Baker County, Oregon|Baker]] 1862, [[Crook County, Oregon|Crook]] 1882, [[Gilliam County, Oregon|Gilliam]] 1855, [[Grant County, Oregon|Grant]] 1864, [[Hood River County, Oregon|Hood River]] 1908, [[Lake County, Oregon|Lake]] 1874, [[Sherman County, Oregon|Sherman]] 1889, [[Umatilla County, Oregon|Umatilla]] 1862
| [[Baker County, Oregon|Baker]] 1862, [[Crook County, Oregon|Crook]] 1882, [[Gilliam County, Oregon|Gilliam]] 1855, [[Grant County, Oregon|Grant]] 1864, [[Hood River County, Oregon|Hood River]] 1908, [[Lake County, Oregon|Lake]] 1874, [[Sherman County, Oregon|Sherman]] 1889, [[Umatilla County, Oregon|Umatilla]] 1862
|-
|-
| [[Washington County, Oregon|Washington]]  
| [[Washington County, Oregon|Washington]]  
| 22 Dec 1845
| 1845  Dec 22  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#WASHINGTON Details]
| renamed from [[Twality County, Oregon|Twality]]  
| renamed from [[Twality County, Oregon|Twality]]  
| [[Columbia County, Oregon|Columbia]] 1854, [[Multnomah County, Oregon|Multnomah]] 1854
| [[Columbia County, Oregon|Columbia]] 1854, [[Multnomah County, Oregon|Multnomah]] 1854
|-
|-
| [[Wheeler County, Oregon|Wheeler]]  
| [[Wheeler County, Oregon|Wheeler]]  
| 17 Feb 1899
| 1899  Feb 17  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#WHEELER Details]
| [[Crook County, Oregon|Crook]], [[Gilliam County, Oregon|Gilliam]], [[Grant County, Oregon|Grant]]  
| [[Crook County, Oregon|Crook]], [[Gilliam County, Oregon|Gilliam]], [[Grant County, Oregon|Grant]]  
| none
| none
|-
|-
| [[Yamhill County, Oregon|Yamhill]]  
| [[Yamhill County, Oregon|Yamhill]]  
| 05 Jul 1843
| 1843  Jul 05  
| [http://publications.newberry.org/ahcbp/documents/OR_Individual_County_Chronologies.htm#YAMHILL Details]
| [[Oregon Country|Oregon Country]]  
| [[Oregon Country|Oregon Country]]  
| [[Polk County, Oregon|Polk]] 1845, [[Tillamook County, Oregon|Tillamook]] 1853
| [[Polk County, Oregon|Polk]] 1845, [[Tillamook County, Oregon|Tillamook]] 1853

Revision as of 12:17, 19 June 2014

Note
 See an interactive outline map of Oregon Historical Counties at Newberry Library site[1] (Free) Enter a year, Refresh Map, select zoom in, then click on the map to enlarge it.

0

Tip
 Sort the table by Date Formed or by Parent Counties and check Boundary Changes for interesting insights.
Name of County Date Formed Boundary
Changes 		Parent County Counties Created by Boundary Changes
Baker 1862 Sep 22 Details Wasco Malheur 1887, Union 1864
Benton 1847 Dec 23 Details Polk Lincoln 1893, Umpqua 1851
Champoeg 1843 Jul 05 Details Oregon Country Linn 1847, renamed Marion 1849
Clackamas 1843 Jul 05 Details Oregon Country Multnomah 1854, Wasco 1854
Clark 1843 Jul 05 Details Oregon Country now in Washington State
Clatsop 1844 Jun 22 Details Twality Tillamook 1853
Columbia 1854 Jan 16 Details Washington none
Coos 1853 Dec 22 Details Umpqua, Jackson Curry 1855
Crook 1882 Oct 24 Details Wasco Deschutes 1916, Jefferson 1914, Wheeler 1899
Curry 1855 dec 18 Details Coos none
Deschutes 1916 Dec 13 Details Crook none
Douglas 1852 Jan 07 Details Umpqua Wasco 1854
Gilliam 1885 Feb 25 Details Wasco Wheeler 1899
Grant 1864 Oct 14 Details Wasco, Umatilla Harney 1889, Wheeler 1899
Harney 889 Feb 23 Details Grant none
Hood River 1908 Jun 23 Details Wasco none
Jackson 1852 Jan 12 Details Umpqua Coos 1853, Josephine 1856, Lake 1874, Wasco 1854
Jefferson 1914 Dec 12 Details Crook none
Josephine 1856 Jan 22 Details Jackson none
Klamath 1882 Oct 17 Details Lake none
Lake 1874 Oct 24 Details Jackson, Wasco Klamath 1882
Lane 1851 Jan 28 Details Linn, Umpqua Wasco 1854
Lewis 1845 Dec 09 Details Oregon Country now in Washington State
Lincoln 1893 Feb 20 Details Benton, Polk none
Linn 1847 Dec 28 Details Champoeg Lane 1851, Umpqua 1851, Wasco 1854
Malheur 1887 Feb 17 Details Baker none
Marion 1849 Sep 03 Details renamed from Champoeg Wasco 1854
Morrow 1885 Feb 16 Details Umatilla none
Multnomah 1854 Dec 22 Details Washington, Clackamas none
Polk 1845 Dec 22 Details Yamhill Benton 1847, Lincoln 1893, Tillamook 1853
Sherman 1889 Feb 25 Details Wasco none
Tillamook 1853 Dec 15 Details Clatsop, Polk, Yamhill none
Twality 1843 Jul 05 Details Oregon Country renamed Washington 1845
Umatilla 1862 Sep 27 Details Wasco Grant 1864, Morrow 1885
Umpqua 1851 Jan 28 Details Benton, Linn Coos 1853, Douglas 1852, Jackson 1852, Lane 1851, dissolved into Douglas 1863
Union 1864 Oct 14 Details Baker Wallowa 1887, Baker 1901
Wallowa 1887 Feb 11 Details Union none
Wasco 1854 Jan 11 Details Clackamas, Marion, Linn, Lane, Douglas, Lewis County, Washington, Clark County, Washington (entire area east of Cascades) Baker 1862, Crook 1882, Gilliam 1855, Grant 1864, Hood River 1908, Lake 1874, Sherman 1889, Umatilla 1862
Washington 1845 Dec 22 Details renamed from Twality Columbia 1854, Multnomah 1854
Wheeler 1899 Feb 17 Details Crook, Gilliam, Grant none
Yamhill 1843 Jul 05 Details Oregon Country Polk 1845, Tillamook 1853
  1. ↑ [http://historical-county.newberry.org/website/Oregon/viewer.htm Oregon Atlas of Historical County Boundaries, John H. Long, Editor; Peggy Tuck Sinko, Associate Editor; Gordon DenBoer, Historical Compiler; Douglas Knox, Book Digitizing Director and Digital Compiler; Emily Kelley, Research Associate; Laura Rico-Beck, GIS Specialist; Peter Siczewicz, ArcIMS Interactive Map Designer; Robert Will, Cartographic Assistant. Copyright The Newberry Library 2008.
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