Recorded 1984–2023 · United States
Katlynn was most popular in 1999, when 268 American babies were given the name — ranking #1,444 that year. It was not recorded in 2025. Across 1880–2025 the Social Security Administration has recorded 3,975 people named Katlynn.
Katlynn first appears in Social Security Administration records in 1984, which makes it about 41 years old as a recorded American name. It has been recorded in 38 of the 42 years since.
The Social Security Administration has recorded 3,975 American births named Katlynn 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 3,920 are estimated to be alive today.
Katlynn was not recorded in 2025. The SSA withholds any name given to fewer than five babies in a year, so fewer than five American babies were given it.
Katlynn is falling. Across 2021–2025 it averaged 6 births a year, against 32 a year across 2011–2015 — a change of -81% 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 Katlynn is a girl’s name — 100.0% of the 3,975 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 3,920 Americans named Katlynn are alive today — 99% of everyone ever recorded with the name. The median is 28 years old, and half are between 23 and 32. That is a narrow band: Katlynn 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 Katlynn on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org