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List of counties in Oregon facts for kids

Kids Encyclopedia Facts
See also: List of United States counties and county-equivalents
Counties of Oregon
Location State of Oregon
Number 36
Populations 1,430 (Wheeler) – 756,530 (Multnomah)
Areas 435 square miles (1,130 km2) (Multnomah) – 10,135 square miles (26,250 km2) (Harney)
Government County government
Subdivisions cities, towns, townships, unincorporated communities, indian reservations, census designated place
Oregon counties by date of establishment
Oregon counties by date of establishment      1840–1849      1850–1859      1860–1869      1870–1889      After 1890

The following is a list of 36 counties in the U.S. state of Oregon. The Oregon Constitution does not explicitly provide for county seats; Article VI, covering the "Administrative Department" of the state of Oregon, simply states that:

All county and city officers shall keep their respective offices at such places therein, and perform such duties, as may be prescribed by law.

More details on the etymologies of Oregon county names and place names in general are documented in Oregon Geographic Names. Oregon's postal abbreviation is OR and its FIPS state code is 41.

County information

The Federal Information Processing Standard (FIPS) code, which is used by the United States government to uniquely identify counties, is provided with each entry. The FIPS code for each county links to census data for that county.


County seat



Baker County 001 Baker City 1862 Wasco County, Union County and Malheur County Edward Dickinson Baker, a senator from Oregon who was killed at Ball's Bluff, a battle of the American Civil War &&&&&&&&&&016510.&&&&&016,510 &&&&&&&&&&&03068.&&&&&03,068 sq mi
(&&&&&&&&&&&07946.&&&&&07,946 km²)
State map highlighting Baker County
Benton County 003 Corvallis 1847 Polk County Thomas Hart Benton (1782 - 1858), a U.S. senator who advocated U.S. control over the Oregon Country &&&&&&&&&&091320.&&&&&091,320 &&&&&&&&&&&&0676.&&&&&0676 sq mi
(&&&&&&&&&&&01751.&&&&&01,751 km²)
State map highlighting Benton County
Clackamas County 005 Oregon City 1843 One of the original four districts of the Oregon Country The Clackamas Indians, a Native American tribe living in the area. &&&&&&&&&0404980.&&&&&0404,980 &&&&&&&&&&&01868.&&&&&01,868 sq mi
(&&&&&&&&&&&04838.&&&&&04,838 km²)
State map highlighting Clackamas County
Clatsop County 007 Astoria 1844 Northern and western portions of the original Twality District Clatsop tribe of Native Americans, who lived along the coast of the Pacific Ocean prior to European settlement &&&&&&&&&&038225.&&&&&038,225 &&&&&&&&&&&&0827.&&&&&0827 sq mi
(&&&&&&&&&&&02142.&&&&&02,142 km²)
State map highlighting Clatsop County
Columbia County 009 Saint Helens 1854 Northern half of Washington County Columbia River, which forms the county's northern borders &&&&&&&&&&050795.&&&&&050,795 &&&&&&&&&&&&0657.&&&&&0657 sq mi
(&&&&&&&&&&&01702.&&&&&01,702 km²)
State map highlighting Columbia County
Coos County 011 Coquille 1853 Western parts of Umpqua and Jackson Counties The Coos Tribe of Native Americans who lived in the region &&&&&&&&&&063190.&&&&&063,190 &&&&&&&&&&&01600.&&&&&01,600 sq mi
(&&&&&&&&&&&04144.&&&&&04,144 km²)
State map highlighting Coos County
Crook County 013 Prineville 1882 Southern part of Wasco County George Crook (1828 - 1890), a U.S. Army officer who served in the American Civil War and the Indian Wars &&&&&&&&&&021580.&&&&&021,580 &&&&&&&&&&&02980.&&&&&02,980 sq mi
(&&&&&&&&&&&07718.&&&&&07,718 km²)
State map highlighting Crook County
Curry County 015 Gold Beach 1855 Coos County George Law Curry (1820-1878), a governor of the Oregon Territory &&&&&&&&&&022600.&&&&&022,600 &&&&&&&&&&&01627.&&&&&01,627 sq mi
(&&&&&&&&&&&04214.&&&&&04,214 km²)
State map highlighting Curry County
Deschutes County 017 Bend 1916 Southern part of Crook County "Riviere des Chutes", French for "River of the Falls". &&&&&&&&&0176635.&&&&&0176,635 &&&&&&&&&&&03018.&&&&&03,018 sq mi
(&&&&&&&&&&&07817.&&&&&07,817 km²)
State map highlighting Deschutes County
Douglas County 019 Roseburg 1852 Portion of Umpqua County which lay east of the Coast Range summit Stephen A. Douglas (1813 - 1861), a U.S. Senator who supported Oregon statehood &&&&&&&&&0110395.&&&&&0110,395 &&&&&&&&&&&05037.&&&&&05,037 sq mi
(&&&&&&&&&&013046.&&&&&013,046 km²)
State map highlighting Douglas County
Gilliam County 021 Condon 1885 Eastern third of Wasco County Cornelius Gilliam (1798 - 1848), a pioneer who commanded the forces of the Provisional Government of Oregon after the Whitman Massacre &&&&&&&&&&&01980.&&&&&01,980 &&&&&&&&&&&01204.&&&&&01,204 sq mi
(&&&&&&&&&&&03118.&&&&&03,118 km²)
State map highlighting Gilliam County
Grant County 023 Canyon City 1864 Parts of old Wasco and old Umatilla counties Ulysses S. Grant (1822 - 1885), army officer who served in the Oregon Territory; a Union general in the American Civil War at the time of the county's creation; and subsequently President of the United States (1869–1877) &&&&&&&&&&&07410.&&&&&07,410 &&&&&&&&&&&04529.&&&&&04,529 sq mi
(&&&&&&&&&&011730.&&&&&011,730 km²)
State map highlighting Grant County
Harney County 025 Burns 1889 Southern two-thirds of Grant County William S. Harney (1800 - 1889), a cavalry officer of the period, who was involved in the Pig War &&&&&&&&&&&07320.&&&&&07,320 &&&&&&&&&&010135.&&&&&010,135 sq mi
(&&&&&&&&&&026250.&&&&&026,250 km²)
State map highlighting Harney County
Hood River County 027 Hood River 1908 Northwest portion of Wasco County The Hood River (a tributary of the Columbia River), which flows through the county &&&&&&&&&&024735.&&&&&024,735 &&&&&&&&&&&&0522.&&&&&0522 sq mi
(&&&&&&&&&&&01352.&&&&&01,352 km²)
Jackson County 029 Medford 1852 Southwestern portion of Lane County and the unorganized area south of Douglas and Umpqua Counties Andrew Jackson (1767–1845), the seventh President of the United States &&&&&&&&&0213765.&&&&&0213,765 &&&&&&&&&&&02785.&&&&&02,785 sq mi
(&&&&&&&&&&&07213.&&&&&07,213 km²)
State map highlighting Jackson County
Jefferson County 031 Madras 1914 Crook County Mount Jefferson, which is located on its western boundary, named in turn for Thomas Jefferson (1743 - 1826), the 3rd president of the United States. &&&&&&&&&&022790.&&&&&022,790 &&&&&&&&&&&01781.&&&&&01,781 sq mi
(&&&&&&&&&&&04613.&&&&&04,613 km²)
State map highlighting Jefferson County
Josephine County 033 Grants Pass 1856 Western half of Jackson County Virginia "Josephine" Rollins, the first white woman to make this county her home. &&&&&&&&&&084675.&&&&&084,675 &&&&&&&&&&&01640.&&&&&01,640 sq mi
(&&&&&&&&&&&04248.&&&&&04,248 km²)
State map highlighting Josephine County
Klamath County 035 Klamath Falls 1882 Western part of Lake County The Klamath or Clamitte tribe, which has had a presence in the area for 10,000 years. &&&&&&&&&&067410.&&&&&067,410 &&&&&&&&&&&05945.&&&&&05,945 sq mi
(&&&&&&&&&&015397.&&&&&015,397 km²)
State map highlighting Klamath County
Lake County 037 Lakeview 1874 Jackson and Wasco Counties Numerous lakes and hot springs. &&&&&&&&&&&08015.&&&&&08,015 &&&&&&&&&&&07940.&&&&&07,940 sq mi
(&&&&&&&&&&020565.&&&&&020,565 km²)
State map highlighting Lake County
Lane County 039 Eugene 1851 Southern part of Linn County and the portion of Benton County east of Umpqua County Gen. Joseph Lane (1801–1881), the first governor of Oregon Territory &&&&&&&&&0365940.&&&&&0365,940 &&&&&&&&&&&04554.&&&&&04,554 sq mi
(&&&&&&&&&&011795.&&&&&011,795 km²)
State map highlighting Lane County
Lincoln County 041 Newport 1893 Western portion of Benton County and Polk County Abraham Lincoln (1809 - 1865), sixteenth President of the United States. &&&&&&&&&&047735.&&&&&047,735 &&&&&&&&&&&&0980.&&&&&0980 sq mi
(&&&&&&&&&&&02538.&&&&&02,538 km²)
State map highlighting Lincoln County
Linn County 043 Albany 1847 Southern portion of Champoeg (later Marion) County U.S. Senator Lewis F. Linn (1795 - 1843) of Missouri, author of the Donation Land Act, which provided free land to settlers in the West. &&&&&&&&&0122315.&&&&&0122,315 &&&&&&&&&&&02291.&&&&&02,291 sq mi
(&&&&&&&&&&&05934.&&&&&05,934 km²)
State map highlighting Linn County
Malheur County 045 Vale 1887 Southern portion of Baker County Malheur River (formally "Riviere au Malheur" or "Unfortunate River"), named by French trappers whose property and furs were stolen from their river encampment. &&&&&&&&&&031705.&&&&&031,705 &&&&&&&&&&&09888.&&&&&09,888 sq mi
(&&&&&&&&&&025610.&&&&&025,610 km²)
State map highlighting Malheur County
Marion County 047 Salem 1843 One of the original four districts of the Oregon territory Francis Marion (1732–1795), American Revolutionary War general &&&&&&&&&0333950.&&&&&0333,950 &&&&&&&&&&&01185.&&&&&01,185 sq mi
(&&&&&&&&&&&03069.&&&&&03,069 km²)
State map highlighting Marion County
Morrow County 049 Heppner 1885 Western portion of Umatilla County and a small portion of eastern Wasco County Jackson L. Morrow, a state representative who advocated for the formation of the county. &&&&&&&&&&011745.&&&&&011,745 &&&&&&&&&&&02033.&&&&&02,033 sq mi
(&&&&&&&&&&&05265.&&&&&05,265 km²)
State map highlighting Morrow County
Multnomah County 051 Portland 1854 Eastern part of Washington and the northern part of Clackamas counties The Indian village of Multnomah, on Sauvie Island. The word is derived from nematlnomaq, probably meaning downriver. Lewis and Clark made note of the name in 1805, and applied that name to all local Indians. &&&&&&&&&0790670.&&&&&0790,670 &&&&&&&&&&&&0435.&&&&&0435 sq mi
(&&&&&&&&&&&01127.&&&&&01,127 km²)
State map highlighting Multnomah County
Polk County 053 Dallas 1845 Yamhill District James Knox Polk (1795–1849), President of the United States at the time of the county's creation &&&&&&&&&&079730.&&&&&079,730 &&&&&&&&&&&&0741.&&&&&0741 sq mi
(&&&&&&&&&&&01919.&&&&&01,919 km²)
State map highlighting Polk County
Sherman County 055 Moro 1889 Northeast corner of Wasco County William Tecumseh Sherman (1820 - 1891), American Civil War general, and businessman, educator, and author &&&&&&&&&&&01795.&&&&&01,795 &&&&&&&&&&&&0823.&&&&&0823 sq mi
(&&&&&&&&&&&02132.&&&&&02,132 km²)
State map highlighting Sherman County
Tillamook County 057 Tillamook 1853 Clatsop, Yamhill and Polk Counties Tillamook (or Killamook) Native American people. &&&&&&&&&&025920.&&&&&025,920 &&&&&&&&&&&01102.&&&&&01,102 sq mi
(&&&&&&&&&&&02854.&&&&&02,854 km²)
State map highlighting Tillamook County
Umatilla County 059 Pendleton 1862 Portion of Wasco County Sahaptin word, possibly meaning laughing waters. &&&&&&&&&&079880.&&&&&079,880 &&&&&&&&&&&03215.&&&&&03,215 sq mi
(&&&&&&&&&&&08327.&&&&&08,327 km²)
State map highlighting Umatilla County
Union County 061 La Grande 1864 Baker County The town of Union, which had been established two years before and named by its founders for the "Union" of the states during the Civil War. &&&&&&&&&&026745.&&&&&026,745 &&&&&&&&&&&02037.&&&&&02,037 sq mi
(&&&&&&&&&&&05276.&&&&&05,276 km²)
State map highlighting Union County
Wallowa County 063 Enterprise 1887 Eastern portion of Union County. The Nez Perce word wallowa to designate a tripod of poles used to support fish nets. The area was claimed by the Chief Joseph band of the Nez Perce as its hunting and fishing grounds &&&&&&&&&&&07140.&&&&&07,140 &&&&&&&&&&&03145.&&&&&03,145 sq mi
(&&&&&&&&&&&08146.&&&&&08,146 km²)
State map highlighting Wallowa County
Wasco County 065 The Dalles 1854 Parts of Clackamas, Lane, Linn and Marion counties The Wasco (or Wascopam) Native American tribe. &&&&&&&&&&026700.&&&&&026,700 &&&&&&&&&&&02381.&&&&&02,381 sq mi
(&&&&&&&&&&&06167.&&&&&06,167 km²)
State map highlighting Wasco County
Washington County 067 Hillsboro 1843 One of the original four districts of the Oregon Country (as Twality District) George Washington (1732 - 1799), Founding Father of the United States and first President of the United States &&&&&&&&&0583595.&&&&&0583,595 &&&&&&&&&&&&0724.&&&&&0724 sq mi
(&&&&&&&&&&&01875.&&&&&01,875 km²)
State map highlighting Washington County
Wheeler County 069 Fossil 1899 Parts of Grant, Gilliam, and Crook Counties Henry H. Wheeler, who operated the first mail stage line from The Dalles to Canyon City. &&&&&&&&&&&01465.&&&&&01,465 &&&&&&&&&&&01715.&&&&&01,715 sq mi
(&&&&&&&&&&&04442.&&&&&04,442 km²)
State map highlighting Wheeler County
Yamhill County 071 McMinnville 1843 One of the original four districts of the Oregon Country The Yamhelas, members of the Kalapuya Native American family, who lived along the Yamhill River in the western Willamette Valley. &&&&&&&&&0104990.&&&&&0104,990 &&&&&&&&&&&&0716.&&&&&0716 sq mi
(&&&&&&&&&&&01854.&&&&&01,854 km²)
State map highlighting Yamhill County
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