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Washington County Creation Dates and Parent Counties

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


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
Adams 1883 Nov 28 Details Whitman none
Asotin 1883 Oct 27 Details Garfield none
Benton 1905 Mar 08 Details Yakima, Klickitat none
Chehalis 1854 Apr 14 Details Washington Territory renamed Gray’s Harbor 1915
Chelan 1899 Mar 13 Details Kittitas, Okanogan none
Clallam 1854 Apr 26 Details Jefferson none
Clark 1849 Sep 03 Details renamed from Vancouver Skamania 1854
Columbia 1875 Nov 11 Details Walla Walla Garfield 1881
Cowlitz 1854 Apr 21 Details Lewis none
Douglas 1883 Nov 28 Details Lincoln Grant 1909
Ferry 1899 Feb 21 Details Stevens none
Franklin 1883 Nov 28 Details Whitman none
Garfield 1881 Nov 29 Details Columbia Asotin 1883
Grant 1909 Feb 24 Details Grant none
Grays Harbor 1915 Mar 15 Details renamed from Chehalis none
Island 1853 Jan 06 Details Washington Territory Snohomish 1861
Jefferson 1852 Dec 22 Details Washington Territory Clallam 1854
King 1852 Dec 22 Details Washington Territory Kitsap 1857
Kitsap 1857 Jul 13 Details renamed from Slaughter 1857 none
Kittitas 1883 Nov 24 Details Yakima Chelan 1899
Klickitat 1859 Dec 20 Details Walla walla Benton 1905
Lewis 1845 Dec 21 Details Oregon Territory Cowlitz 1854, Wahkiakum 1854
Lincoln 1883 Nov 24 Details Spokane Douglas 1883
Mason 1864 Jan 08 Details renamed from Sawamish none
Okanogan 1888 Feb 02 Details Stevens Chelan 1899
Pacific 1851 Feb 04 Details Washington Territory none
Pend Oreille 1911 Mar 01 Details Stevens none
Pierce 1852 Dec 22 Details Washington Territory none
San Juan 1873 Oct 31 Details Whatcom none
Sawamish 1852 Dec 22 Details Thurston renamed Mason 1864
Skagit 1883 Nov 28 Details Whatcom none
Skamania 1854 Mar 09 Details Clark none
Slaughter 1857 Jan 16 Details King renamed Kitsap 1857
Snohomish 1861 Jan 14 Details Island none
Spokane 1858 Jan 29 Details Walla Walla Lincoln 1883
Stevens 1863 Jan 20 Details Walla Walla Ferry 1899, Okanogan 1888, Pend Oreille 1911, Whitman 1871
Thurston 1852 Jan 12 Details Washington Territory Sawamish 1852
Vancouver 1845 Dec 21 Details Oregon Territory renamed Clark 1849
Wahkiakum 1854 Apr 26 Details Lewis none
Walla Walla 1854 Apr 25 Details Washington Territory Columbia 1875, Klickitat 1859, Spokane 1859, Stevens 1863, Yakima 1865
Whatcom 1854 Mar 09 Details Washington Territory San Juan 1873, Skagit 1883
Whitman 1871 Nov 29 Details Stevens Adams 1883, Franklin 1883
Yakima 1865 Jan 21 Details Walla Walla Benton 1905, Kittitas 1883

References

  1. ↑ [http://historical-county.newberry.org/website/Washington/viewer.htm Washington 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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