Population of Ontario, Oregon as of October 2025. How many people live in Ontario today?

The exact population of Ontario, Oregon as of October 2025 is estimated at 11,645 residents. Please note: this figure is an estimate and may slightly change as people get born and pass away, it also depends on migration to/from Ontario.

Check out more data on population in Oregon:

• Population of Beaverton
• Population of Corvallis
• Population of Grants Pass
• Population of Bethany
• Population of Wilsonville
• Population of Roseburg
• Population of Sherwood
• Population of Hermiston
• Population of Oak Grove
• Population of The Dalles
• Population of Cornelius
• Population of Silverton
• Population of Molalla