Recorded 1880–2025 · United States
Mason was most popular in 2011, when 19,619 American babies were given the name — ranking #4 that year. In 2025 it ranked #65, with 6,342 births. Across 1880–2025 the Social Security Administration has recorded 345,931 people named Mason.
The Social Security Administration’s records begin in 1880, and Mason 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 345,931 American births named Mason 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 337,219 are estimated to be alive today.
6,342 American babies were named Mason in 2025, ranking #65 that year.
Mason is falling. Across 2021–2025 it averaged 7,500 births a year, against 18,114 a year across 2011–2015 — a change of -59% 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 Mason is a boy’s name — 1.0% of the 345,931 Americans given it were girls and 99.0% 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 337,219 Americans named Mason are alive today — 97% of everyone ever recorded with the name. The median is 14 years old, and half are between 9 and 21. That is a narrow band because Mason 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.
Old French · "worker in stone"
How much more common the name is in each state than across the country as a whole.
See Mason on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org