Union County, Oregon

Union County
Union County Museum
Location within the U.S. state of Oregon
Oregon's location within the U.S.
Coordinates: 45°19′38″N 118°05′36″W / 45.327222222222°N 118.09333333333°W / 45.327222222222; -118.09333333333
Country United States
State Oregon
FoundedOctober 14, 1864
Named afterUnion, Oregon
SeatLa Grande
Largest cityLa Grande
Area
  Total
2,039 sq mi (5,280 km2)
  Land2,037 sq mi (5,280 km2)
  Water1.9 sq mi (5 km2)  0.1%
Population
 (2020)
  Total
26,196
  Estimate 
(2024)
26,058
  Density13/sq mi (5/km2)
Time zoneUTC−8 (Pacific)
  Summer (DST)UTC−7 (PDT)
Congressional district2nd
Websiteunioncountyor.gov

Union County is one of the 36 counties in the U.S. state of Oregon, and one of the 8 counties of eastern Oregon. As of the 2020 census, the population was 26,196. The county comprises the La Grande micropolitan statistical area and the county seat is La Grande.