Recorded 1899–2025 · United States
Rosalyn was most popular in 1955, when 422 American babies were given the name — ranking #777 that year. In 2025 it ranked #1,982, with 237 births. Across 1880–2025 the Social Security Administration has recorded 23,278 people named Rosalyn.
Rosalyn first appears in Social Security Administration records in 1899, which makes it about 126 years old as a recorded American name. It has been recorded in 125 of the 127 years since.
The Social Security Administration has recorded 23,278 American births named Rosalyn between 1880 and 2025. That is recorded US births, not a world population — it counts people issued a Social Security number at birth in the United States. Of those, roughly 17,178 are estimated to be alive today.
237 American babies were named Rosalyn in 2025, ranking #1,982 that year.
Rosalyn is rising. Across 2021–2025 it averaged 283 births a year, against 203 a year across 2011–2015 — a change of +40% over the decade.
Measured on recorded births. American births overall have fallen since 2007, so most established names lose births over any recent decade — a name can shed births and still hold its rank. Compare the rank above, which is measured against the other names of the same year.
Across the whole record Rosalyn is a girl’s name — 100.0% of the 23,278 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.
Roughly 17,178 Americans named Rosalyn are alive today — 74% of everyone ever recorded with the name. The median is 51 years old, and half are between 18 and 69. That is a wide band, the mark of a name in steady use across generations rather than a passing fashion.
An estimate, not a count. Recorded births are carried forward through the Social Security Administration’s 2023 period life table, by age and sex. That table describes mortality in one recent year, so it credits the oldest cohorts with today’s survival rather than the harsher rates they actually lived through — the further back a name peaked, the more this will overstate how many remain. It counts people issued a Social Security number at birth, not immigrants who arrived later.
How much more common the name is in each state than across the country as a whole.
See Rosalyn on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org