List of counties in Oregon

Counties of Oregon
LocationState of Oregon
Number36
Populations1,436 (Wheeler) – 789,698 (Multnomah)[1]
Areas435 square miles (1,130 km2) (Multnomah) – 10,135 square miles (26,250 km2) (Harney)
Government
Subdivisions

There are 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.[2]

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.

Oregon counties by date of establishment
  1840–1849
  1850–1859
  1860–1869
  1870–1889
  After 1890
  1. ^ "U.S. Census Bureau QuickFacts: Multnomah County, Oregon". census.gov.
  2. ^ "Oregon Secretary of State: Constitution of Oregon". sos.oregon.gov.