Is Sister a boy or girl name?

Sister is a girl’s name. Of the 563 Americans recorded with the name since 1880, 100.0% were girls and 0.0% were boys.

Sister

Recorded 1883–1946 · United States

Sister was most popular in 1914, when 21 American babies were given the name — ranking #2,555 that year. It was not recorded in 2025. Across 1880–2025 the Social Security Administration has recorded 563 people named Sister.

Sister over time

Births per year. The dot marks Sister’s peak in 1914. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Sister a boy’s or a girl’s name?

Across the whole record Sister is a girl’s name — 100.0% of the 563 Americans given it were girls and 0.0% 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 Sister

Explore further

See Sister on the interactive charts

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