Recorded 1959–2025 · United States
Kaelyn was most popular in 2009, when 1,006 American babies were given the name — ranking #655 that year. In 2025 it ranked #2,940, with 131 births. Across 1880–2025 the Social Security Administration has recorded 15,648 people named Kaelyn.
Kaelyn first appears in Social Security Administration records in 1959, which makes it about 66 years old as a recorded American name. It has been recorded in 52 of the 67 years since.
The Social Security Administration has recorded 15,648 American births named Kaelyn 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 15,496 are estimated to be alive today.
131 American babies were named Kaelyn in 2025, ranking #2,940 that year.
Kaelyn is falling. Across 2021–2025 it averaged 147 births a year, against 685 a year across 2011–2015 — a change of -79% 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 Kaelyn is a girl’s name — 99.5% of the 15,648 Americans given it were girls and 0.5% 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 15,496 Americans named Kaelyn are alive today — 99% of everyone ever recorded with the name. The median is 18 years old, and half are between 13 and 23. That is a narrow band: Kaelyn arrived and faded within about a decade rather than staying in steady use.
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 Kaelyn on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org