Ontario is located in Malheur County, OR. The population is 11,273, making Ontario the largest city in Malheur County.
There are 9 public schools in Ontario with an average Homefacts rating of C-. The total crime rate for Ontario is very low , and there are 44 registered sex offenders residing in the city. Unemployment in Ontario is very high and the median home sales price is $0. Detailed and up-to-date Ontario property reports are available for any property address.
Cities near Ontario include Fruitland, Payette and New Plymouth.