Is Sinead a boy or girl name?

Sinead is a girl’s name. Of the 1,340 Americans recorded with the name since 1880, 100.0% were girls and 0.0% were boys.

Name Legacy

Sinead

Recorded 1975–2025 · United States

Sinead was most popular in 1990, when 160 American babies were given the name — ranking #1,862 that year. In 2025 it ranked #15,103, with 11 births. Across 1880–2025 the Social Security Administration has recorded 1,340 people named Sinead.

Sinead over time

Births per year. The dot marks Sinead’s peak in 1990. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Sinead a boy’s or a girl’s name?

Across the whole record Sinead is a girl’s name — 100.0% of the 1,340 Americans given it were girls and 0.0% were boys. 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 Sinead

Where Sinead is most concentrated

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

Explore further

See Sinead on the interactive charts

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