List of counties in Oregon

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.

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.

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Oregon counties by date of establishment

  1840–1849

  1850–1859

  1860–1869

  1870–1889

  After 1890

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.

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See also

• Umpqua County, Oregon (historic)
• Oregon locations by per capita income
• List of U.S. county secession proposals#Oregon
• Lists of Oregon-related topics

Further reading

• writer, Statf (2022). "OREGON COUNTY GOVERNMENT OVERVIEW" (PDF). ce.naco.org. National Association of Counties (NACo). Retrieved January 3, 2025.

External links

• Historic county boundaries from the Oregon Archives
• Holman, Frederick van Voorhies (March 1910). "Oregon Counties, Their Creations and the Origins of Their Names" . Oregon Historical Quarterly.
• Map of counties adjusted for population