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
21,758

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