Oregon Counties by Name

Name Created County Seat Sq.Miles 2010 Pop.
Baker 22 Sep 1862Baker City3,06816,134
Benton 23 Dec 1847Corvallis67685,579
Champoeg 5 Jul 1843became Marion County in 1849
Clackamas 5 Jul 1843Oregon City1,868375,992
Clatsop 22 Jun 1844Astoria82737,039
Columbia 16 Jan 1854St. Helens 65649,351
Coos 22 Dec 1853Coquille 1,60063,043
Crook 24 Oct 1882Prineville 2,97920,978
Curry 18 Dec 1855Gold Beach 1,62722,364
Deschutes 13 Dec 1916Bend 3,018157,733
Douglas 7 Jan 1852Roseburg 5,036107,667
Gilliam 25 Feb 1885Condon 1,2041,871
Grant 14 Oct 1864Canyon City 4,5287,445
Harney 25 Feb 1889Burns 10,1347,422
Hood River 23 Jun 1908Hood River 52222,346
Jackson 12 Jan 1852Medford 2,785203,206
Jefferson 12 Dec 1914Madras 1,78021,720
Josephine 22 Jan 1856Grants Pass 1,63982,713
Klamath 17 Oct 1882Klamath Falls 5,94466,380
Lake 24 Oct 1874Lakeview 8,1357,895
Lane 28 Jan 1851Eugene 4,554351,715
Lincoln 20 Feb 1893Newport 97946,034
Linn 28 Dec 1847Albany 2,292116,672
Malheur 17 Feb 1887Vale 9,88731,313
Marion 1849Salem 1,183315,335
Morrow 16 Feb 1885Heppner 2,03211,173
Multnomah 22 Dec 1854Portland 435735,334
Polk 22 Dec 1845Dallas 74175,403
Sherman 25 Feb 1889Moro 8231,765
Tillamook 15 Dec 1853Tillamook 1,10225,250
Tuality 1843became Washington County in 1849
Umatilla 27 Sep 1862Pendleton 3,21575,889
Umpqua 1851merged with Douglas County in 1862
Union 14 Oct 1864La Grande 2,03625,748
Wallowa 11 Feb 1877Enterprise 3,1457,008
Wasco 11 Jan 1854The Dalles 2,38125,213
Washington 3 Sep 1849Hillsboro 723529,710
Wheeler 17 Feb 1899Fossil 1,7141,441
Yamhill 5 Jul 1843McMinnville 71599,193
36 counties as of 1916 Total 95,996 3,831,074