Morrow County, Oregon

Morrow County
Morrow County Courthouse in Heppner
Location within the U.S. state of Oregon
Oregon's location within the U.S.
Coordinates: 45°25′N 119°34′W / 45.42°N 119.57°W / 45.42; -119.57
Country United States
State Oregon
FoundedFebruary 16, 1885
Named afterJackson L. Morrow
SeatHeppner
Largest cityBoardman
Area
  Total
2,049 sq mi (5,310 km2)
  Land2,032 sq mi (5,260 km2)
  Water17 sq mi (40 km2)  0.8%
Population
 (2020)
  Total
12,186
  Estimate 
(2024)
12,360
  Density5.9/sq mi (2.3/km2)
Time zoneUTC−8 (Pacific)
  Summer (DST)UTC−7 (PDT)
Congressional district2nd
Websitewww.co.morrow.or.us

Morrow County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 12,186. The county seat is Heppner. The county is named for one of its first settlers, Jackson L. Morrow, who was a member of the state legislature when the county was created. Half of the Umatilla Chemical Depot, which includes the Umatilla Chemical Agent Disposal Facility, and the Naval Weapons Systems Training Facility Boardman are located within the county. Morrow County is part of the Pendleton-Hermiston, OR, Micropolitan Statistical Area. It is located on the south side of the Columbia River and is included in the eight-county definition of Eastern Oregon.