Malheur County, Oregon

Malheur County
Malheur County Courthouse in Vale
Location within the U.S. state of Oregon
Oregon's location within the U.S.
Coordinates: 43°13′N 117°38′W / 43.21°N 117.63°W / 43.21; -117.63
Country United States
State Oregon
FoundedFebruary 17, 1887
Named afterMalheur River
SeatVale
Largest cityOntario
Government
  County JudgeDan Joyce
Area
  Total
9,930 sq mi (25,700 km2)
  Land9,888 sq mi (25,610 km2)
  Water42 sq mi (110 km2)  0.4%
Population
 (2020)
  Total
31,571
  Estimate 
(2024)
32,315
  Density3.2/sq mi (1.2/km2)
Time zones
primaryUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
southern fifthUTC−8 (Pacific)
  Summer (DST)UTC−7 (PDT)
Congressional district2nd
Websitewww.malheurco.org

Malheur County (/mælˈhɪər/, French pronunciation: [ma.lœʁ]) is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 31,571. Its county seat is Vale, and its largest city is Ontario. The county was named after the Malheur River, which runs through the county. The word "malheur" is French for misfortune or tragedy. Malheur County is included in the Ontario, Oregon Micropolitan Statistical Area, which is also included in the Boise Combined Statistical Area. It is included in the eight-county definition of Eastern Oregon.