Ontario is a village in Vernon County, Wisconsin, United States.

[7] As of the census[3] of 2010, there were 554 people, 210 households, and 135 families living in the village.

There were 253 housing units at an average density of 253.0 per square mile (97.7/km2).

29.5% of all households were made up of individuals, and 15.8% had someone living alone who was 65 years of age or older.

There were 254 housing units at an average density of 250.9 per square mile (97.1/km2).

36.4% of all households were made up of individuals, and 21.8% had someone living alone who was 65 years of age or older.