Ontario Flag

Ontario

County:
Malheur County
County Seat:
No
Area (mi²):
5.985
State:
Oregon

Ontario is a city located in Malheur County, Oregon. Ontario has a 2026 population of 11,957. Ontario is currently growing at a rate of 0.2% annually and its population has increased by 1.61% since the most recent census, which recorded a population of 11,767 in 2020.

12K
Total Population
1,998
Density (mi²)
24 0.2%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)