Recorded 1977–2025 · United States
Izaac was most popular in 2009, when 151 American babies were given the name — ranking #2,676 that year. In 2025 it ranked #6,099, with 44 births. Across 1880–2025 the Social Security Administration has recorded 2,845 people named Izaac.
Izaac first appears in Social Security Administration records in 1977, which makes it about 48 years old as a recorded American name. It has been recorded in 43 of the 49 years since.
The Social Security Administration has recorded 2,845 American births named Izaac 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 2,807 are estimated to be alive today.
44 American babies were named Izaac in 2025, ranking #6,099 that year.
Izaac is falling. Across 2021–2025 it averaged 51 births a year, against 134 a year across 2011–2015 — a change of -62% 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 Izaac is a boy’s name — 0.0% of the 2,845 Americans given it were girls and 100.0% were boys. In births since 2016 it is 0% girls and 100% 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 2,807 Americans named Izaac are alive today — 99% of everyone ever recorded with the name. The median is 16 years old, and half are between 11 and 22. That is a narrow band: Izaac arrived and faded within about a decade rather than staying in steady use.
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 Izaac on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org