Oregon County Creation Dates and Parent CountiesEdit This Page

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United States Gotoarrow.png Oregon Gotoarrow.png County Creation Dates

Name of County Date Formed Parent County Progeny County
Baker 22 Sep 1862 Wasco Malheur 1887, Union 1864
Benton 23 Dec 1847 Polk Lincoln 1893, Umpqua 1851
Champoeg 05 Jul 1843 Oregon Country Linn 1847, renamed Marion 1849
Clackamas 05 Jul 1843 Oregon Country Multnomah 1854, Wasco 1854
Clark 05 Jul 1843 Oregon Country now in Washington State
Clatsop 22 Jun 1844 Twality Tillamook 1853
Columbia 16 Jan 1854 Washington none
Coos 22 Dec 1853 Umpqua, Jackson Curry 1855
Crook 24 Oct 1882 Wasco Deschutes 1916, Jefferson 1914, Wheeler 1899
Curry 18 dec 1855 Coos none
Deschutes 13 Dec 1916 Crook none
Douglas 07 Jan 1852 Umpqua Wasco 1854
Gilliam 25 Feb 1885 Wasco Wheeler 1899
Grant 14 Oct 1864 Wasco, Umatilla Harney 1889, Wheeler 1899
Harney 23 Feb1 889 Grant none
Hood River 23 Jun 1908 Wasco none
Jackson 12 Jan 1852 Umpqua Coos 1853, Josephine 1856, Lake 1874, Wasco 1854
Jefferson 12 Dec 1914 Crook none
Josephine 22 Jan 1856 Jackson none
Klamath 17 Oct 1882 Lake none
Lake 24 Oct 1874 Jackson, Wasco Klamath 1882
Lane 28 Jan 1851 Linn, Umpqua Wasco 1854
Lewis 09 Dec 1845 Oregon Country now in Washington State
Lincoln 20 Feb 1893 Benton, Polk none
Linn 28 Dec 1847 Champoeg Lane 1851, Umpqua 1851, Wasco 1854
Malheur 17 Feb 1887 Baker none
Marion 03 Sep 1849 renamed from Champoeg Wasco 1854
Morrow 16 Feb 1885 Umatilla none
Multnomah 22 Dec 1854 Washington, Clackamas none
Polk 22 Dec 1845 Yamhill Benton 1847, Lincoln 1893, Tillamook 1853
Sherman 25 Feb 1889 Wasco none
Tillamook 15 Dec 1853 Clatsop, Polk, Yamhill none
Twality 05 Jul 1843 Oregon Country renamed Washington 1845
Umatilla 27 Sep 1862 Wasco Grant 1864, Morrow 1885
Umpqua 28 Jan 1851 Benton, Linn Coos 1853, Douglas 1852, Jackson 1852, Lane 1851, dissolved into Douglas 1863
Union 14 Oct 1864 Baker Wallowa 1887, Baker 1901
Wallowa 11 Feb 1887 Union none
Wasco 11 Jan 1854 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 22 Dec 1845 renamed from Twality Columbia 1854, Multnomah 1854
Wheeler 17 Feb 1899 Crook, Gilliam, Grant none
Yamhill 05 Jul 1843 Oregon Country Polk 1845, Tillamook 1853
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  • This page was last modified on 23 September 2011, at 16:10.
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