Oregon

Clatsop County Columbia County Wallowa County Umatilla County Morrow County Union County Tillamook County Gilliam County Washington County Multnomah County Sherman County Hood River County Wasco County Clackamas County Yamhill County Marion County Baker County Polk County Lincoln County Wheeler County Grant County Jefferson County Linn County Benton County Crook County Malheur County Deschutes County Lane County Harney County Douglas County Coos County Klamath County Lake County Curry County Jackson County Josephine County Josephine County

COUNTY 2015 POPULATION SQUARE MILES COUNTY SEAT BOARD SIZE FOUNDED
Baker County 16,005 3,088 Baker City  1862 
Benton County 87,572 679 Corvallis  1847 
Clackamas County 401,515 1,883 Oregon City  1843 
Clatsop County 37,831 1,084 Astoria  1844 
Columbia County 49,600 688 Saint Helens  1854 
Coos County 63,121 1,806 Coquille  1853 
Crook County 21,630 2,987 Prineville  1882 
Curry County 22,483 1,988 Gold Beach  1855 
Deschutes County 175,268 3,055 Bend  1916 
Douglas County 107,685 5,134 Roseburg  1852 
Gilliam County 1,859 1,223 Condon  1885 
Grant County 7,185 4,529 Canyon City  1864 
Harney County 7,200 10,226 Burns  1889 
Hood River County 23,137 533 Hood River  1908 
Jackson County 212,567 2,802 Medford  1852 
Jefferson County 22,666 1,791 Madras  1914 
Josephine County 84,745 1,642 Grants Pass  1856 
Klamath County 66,016 6,136 Klamath Falls  1882 
Lake County 7,829 8,358 Lakeview  1874 
Lane County 362,895 4,722 Eugene  1851 
Lincoln County 47,038 1,194 Newport  1893 
Linn County 120,547 2,309 Albany  1847 
Malheur County 30,380 9,930 Vale  1887 
Marion County 330,700 1,193 Salem  1843 
Morrow County 11,190 2,049 Heppner  1885 
Multnomah County 790,294 466 Portland  1854 
Polk County 79,391 744 Dallas  1845 
Sherman County 1,680 831 Moro  1889 
Tillamook County 25,653 1,333 Tillamook  1853 
Umatilla County 76,531 3,231 Pendleton  1862 
Union County 25,790 2,039 La Grande  1864 
Wallowa County 6,856 3,152 Enterprise  1887 
Wasco County 25,775 2,395 The Dalles  1854 
Washington County 574,326 726 Hillsboro  1843 
Wheeler County 1,358 1,715 Fossil  1899 
Yamhill County 102,659 718 McMinnville  1843 

* consolidated city-county government