Ontario is a city located in Oregon. With a 2020 population of 10,972, it is the 47th largest city in Oregon and the 2906th largest city in the United States. Ontario is currently declining at a rate of -0.10% annually and its population has decreased by -3.47% since the most recent census, which recorded a population of 11,366 in 2010. Ontario reached it's highest population of 11,377 in 2010. Spanning over 5 miles, Ontario has a population density of 2,124 people per square mile.
The average household income in Ontario is $51,529 with a poverty rate of 27.33%. The median rental costs in recent years comes to $691 per month, and the median house value is $117,800. The median age in Ontario is 34.4 years, 33.3 years for males, and 36.7 years for females. For every 100 females there are 93.2 males.