Recorded 1979–2025 · United States
Katelynn was most popular in 1998, when 1,457 American babies were given the name — ranking #433 that year. In 2025 it ranked #4,792, with 63 births. Across 1880–2025 the Social Security Administration has recorded 30,691 people named Katelynn.
Katelynn first appears in Social Security Administration records in 1979, which makes it about 46 years old as a recorded American name. It has been recorded in 47 of the 47 years since.
The Social Security Administration has recorded 30,691 American births named Katelynn 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 30,312 are estimated to be alive today.
63 American babies were named Katelynn in 2025, ranking #4,792 that year.
Katelynn is falling. Across 2021–2025 it averaged 77 births a year, against 636 a year across 2011–2015 — a change of -88% 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 Katelynn is a girl’s name — 100.0% of the 30,691 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 30,312 Americans named Katelynn are alive today — 99% of everyone ever recorded with the name. The median is 25 years old, and half are between 18 and 30. That is a narrow band: Katelynn 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 Katelynn on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org