Is Duffy a boy or girl name?

Duffy is a boy’s name. Of the 643 Americans recorded with the name since 1880, 2.5% were girls and 97.5% were boys.

Duffy

Recorded 1915–2012 · United States

Duffy was most popular in 1961, when 26 American babies were given the name — ranking #3,708 that year. It was not recorded in 2025. Across 1880–2025 the Social Security Administration has recorded 643 people named Duffy.

Duffy over time

Births per year. The dot marks Duffy’s peak in 1961. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Duffy a boy’s or a girl’s name?

Across the whole record Duffy is a boy’s name — 2.5% of the 643 Americans given it were girls and 97.5% were 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 Duffy

Explore further

See Duffy on the interactive charts

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