Jefferson County, Oregon

Jefferson County
Jefferson County
County
	Jefferson County Courthouse in Madras
	Location within the U.S. state of Oregon
	Oregon's location within the U.S.
	Coordinates: 44°38′N 121°10′W / 44.63°N 121.17°W
Country	United States
State	Oregon
Founded	December 12, 1914
Named for	Mount Jefferson
Seat	Madras
Largest city	Madras
Area
• Total	1,791 sq mi (4,640 km2)
• Land	1,781 sq mi (4,610 km2)
• Water	10 sq mi (30 km2) 0.6%
Population (2020)
• Total	24,502
• Estimate (2023)	25,454
• Density	12/sq mi (5/km2)
Time zone	UTC−8 (Pacific)
• Summer (DST)	UTC−7 (PDT)
Congressional districts	2nd, 5th
Website	www.co.jefferson.or.us

Jefferson County is one of the 36 counties in the U.S. state of Oregon. At the 2020 census, the population was 24,502.^[1] The county seat is Madras.^[2] The county is named after Mount Jefferson, the second tallest mountain in Oregon.^[3]

^ "State & County QuickFacts". United States Census Bureau. Retrieved May 20, 2023.
^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
^ McArthur, Lewis A.; McArthur, Lewis L. (2003) [1928]. Oregon Geographic Names (7th ed.). Portland, Oregon: Oregon Historical Society Press. p. 509. ISBN 978-0875952772.