List of counties in Oregon

Counties of Oregon
MLH BKR WL UNI UMA MR GRANT HARNEY LAKE KL DC CROOK JEFF WH GL SH WS HR MULT CK MN LINN LANE DOUG JC JO CU CS BE LC PK YM TL WA CO CL
Location	State of Oregon
Number	36
Populations	1,436 (Wheeler) – 789,698 (Multnomah)[1]
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

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.