Recorded 1989–2025 · United States
Londyn was most popular in 2014, when 2,123 American babies were given the name — ranking #353 that year. In 2025 it ranked #786, with 812 births. Across 1880–2025 the Social Security Administration has recorded 27,777 people named Londyn.
Londyn first appears in Social Security Administration records in 1989, which makes it about 36 years old as a recorded American name. It has been recorded in 36 of the 37 years since.
The Social Security Administration has recorded 27,777 American births named Londyn 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 27,587 are estimated to be alive today.
812 American babies were named Londyn in 2025, ranking #786 that year.
Londyn is falling. Across 2021–2025 it averaged 1,171 births a year, against 1,866 a year across 2011–2015 — a change of -37% 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 Londyn is a girl’s name — 98.1% of the 27,777 Americans given it were girls and 1.9% were boys. In births since 2016 it is 98% girls and 2% 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 27,587 Americans named Londyn are alive today — 99% of everyone ever recorded with the name. The median is 10 years old, and half are between 6 and 14. That is a narrow band because Londyn is a young name — it only became common recently, so almost everyone carrying it is still a child or a young adult.
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 Londyn on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org