Recorded 1914–2025 · United States
Lenny was most popular in 1960, when 209 American babies were given the name — ranking #1,221 that year. In 2025 it ranked #2,293, with 189 births. Across 1880–2025 the Social Security Administration has recorded 9,035 people named Lenny.
Lenny first appears in Social Security Administration records in 1914, which makes it about 111 years old as a recorded American name. It has been recorded in 102 of the 112 years since.
The Social Security Administration has recorded 9,035 American births named Lenny 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 7,835 are estimated to be alive today.
189 American babies were named Lenny in 2025, ranking #2,293 that year.
Lenny is rising. Across 2021–2025 it averaged 177 births a year, against 133 a year across 2011–2015 — a change of +33% 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 Lenny is mostly a boy’s name — 8.2% of the 9,035 Americans given it were girls and 91.8% were boys. In births since 2016 it is 24% girls and 76% 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 7,835 Americans named Lenny are alive today — 87% of everyone ever recorded with the name. The median is 40 years old, and half are between 14 and 60. That is a wide band, the mark of a name in steady use across generations rather than a passing fashion.
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 Lenny on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org