Recorded 1880–2025 · United States
Lillie was most popular in 1919, when 3,277 American babies were given the name — ranking #139 that year. In 2025 it ranked #1,329, with 420 births. Across 1880–2025 the Social Security Administration has recorded 159,791 people named Lillie.
The Social Security Administration’s records begin in 1880, and Lillie is already there in that first year — so the name is older than the record and these figures cannot date it. It has been recorded in 146 of the 146 years since.
The Social Security Administration has recorded 159,791 American births named Lillie 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 42,718 are estimated to be alive today.
420 American babies were named Lillie in 2025, ranking #1,329 that year.
Lillie is falling. Across 2021–2025 it averaged 398 births a year, against 599 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 Lillie is a girl’s name — 99.5% of the 159,791 Americans given it were girls and 0.5% 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 42,718 Americans named Lillie are alive today — 27% of everyone ever recorded with the name. The median is 68 years old, and half are between 21 and 81. 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 Lillie on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org