Recorded 1880–2025 · United States
Dennis was most popular in 1952, when 24,605 American babies were given the name — ranking #29 that year. In 2025 it ranked #1,424, with 381 births. Across 1880–2025 the Social Security Administration has recorded 623,692 people named Dennis.
The Social Security Administration’s records begin in 1880, and Dennis 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 623,692 American births named Dennis 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 414,051 are estimated to be alive today.
381 American babies were named Dennis in 2025, ranking #1,424 that year.
Dennis is falling. Across 2021–2025 it averaged 402 births a year, against 632 a year across 2011–2015 — a change of -36% 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 Dennis is a boy’s name — 0.4% of the 623,692 Americans given it were girls and 99.6% were boys. In births since 2016 it is 1% girls and 99% 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 414,051 Americans named Dennis are alive today — 66% of everyone ever recorded with the name. The median is 68 years old, and half are between 55 and 75.
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.
Greek · from Dionysius, god of wine
How much more common the name is in each state than across the country as a whole.
See Dennis on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org