Union County, Oregon

Union County, Oregon
Union County Museum
Location within the U.S. state of Oregon
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 (4.9 km2)  0.1%
Population
 (2020)
 • Total
26,196
 • Estimate 
(2024)
26,058
 • Density13/sq mi (5.0/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.