Is Ontario a boy or girl name?

Ontario is a boy’s name. Of the 877 Americans recorded with the name since 1880, 0.0% were girls and 100.0% were boys.

Ontario

Recorded 1967–2024 · United States

Ontario was most popular in 1991, when 35 American babies were given the name — ranking #5,099 that year. It was not recorded in 2025. Across 1880–2025 the Social Security Administration has recorded 877 people named Ontario.

Ontario over time

Births per year. The dot marks Ontario’s peak in 1991. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Ontario a boy’s or a girl’s name?

Across the whole record Ontario is a boy’s name — 0.0% of the 877 Americans given it were girls and 100.0% were boys. In births since 2016 it is 0% girls and 100% boys.

Counted from every US birth the Social Security Administration recorded under this name, so it reflects use rather than opinion. A name given to fewer than five babies of one sex in a year is withheld at source and is not counted.

Names that peaked alongside Ontario

Explore further

See Ontario on the interactive charts

Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org