The baby name Ontario appears in baby name data for the United States from 1975 to 1997. It was most popular in 1991 with 22 babies given the name.
Over the period shown, Ontario has stayed at a similar level of popularity.
| Year | Count |
|---|---|
| 1975 | 14 |
| 1977 | 10 |
| 1986 | 5 |
| 1987 | 5 |
| 1989 | 14 |
| 1991 | 22 |
| 1995 | 5 |
| 1997 | 6 |