Recorded 1970–2025 · United States
Katelyn was most popular in 1993, when 5,975 American babies were given the name — ranking #118 that year. In 2025 it ranked #2,046, with 225 births. Across 1880–2025 the Social Security Administration has recorded 134,206 people named Katelyn.
Katelyn first appears in Social Security Administration records in 1970, which makes it about 55 years old as a recorded American name. It has been recorded in 56 of the 56 years since.
The Social Security Administration has recorded 134,206 American births named Katelyn 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 132,357 are estimated to be alive today.
225 American babies were named Katelyn in 2025, ranking #2,046 that year.
Katelyn is falling. Across 2021–2025 it averaged 302 births a year, against 2,145 a year across 2011–2015 — a change of -86% 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 Katelyn is a girl’s name — 99.9% of the 134,206 Americans given it were girls and 0.1% 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 132,357 Americans named Katelyn are alive today — 99% of everyone ever recorded with the name. The median is 27 years old, and half are between 20 and 33.
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.
Irish · form of Caitlin, itself from Katherine
How much more common the name is in each state than across the country as a whole.
See Katelyn on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org