Is Onnie a boy or girl name?

Onnie is a unisex name. Of the 1,736 Americans recorded with the name since 1880, 62.2% were girls and 37.8% were boys. It changed hands in 1938, and has gone mainly to girls since.

Name Legacy

Onnie

Recorded 1885–2023 · United States

Onnie was most popular in 1915, when 56 American babies were given the name — ranking #1,658 that year. It was not recorded in 2025. Across 1880–2025 the Social Security Administration has recorded 1,736 people named Onnie.

Onnie over time

Births per year. The dot marks Onnie’s peak in 1915. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Onnie a boy’s or a girl’s name?

Across the whole record Onnie is a unisex name — 62.2% of the 1,736 Americans given it were girls and 37.8% were boys. It changed hands: since 1938 it has gone mainly to girls, having gone mainly to boys before that. In births since 2016 it is 100% girls and 0% 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 Onnie

Where Onnie is most concentrated

How much more common the name is in each state than across the country as a whole.

Explore further

See Onnie on the interactive charts

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