Recorded 1990–2025 · United States
Kooper was most popular in 2022, when 257 American babies were given the name — ranking #1,890 that year. In 2025 it ranked #1,942, with 246 births. Across 1880–2025 the Social Security Administration has recorded 4,392 people named Kooper.
Kooper first appears in Social Security Administration records in 1990, which makes it about 35 years old as a recorded American name. It has been recorded in 35 of the 36 years since.
The Social Security Administration has recorded 4,392 American births named Kooper 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 4,351 are estimated to be alive today.
246 American babies were named Kooper in 2025, ranking #1,942 that year.
Kooper is holding steady. Across 2021–2025 it averaged 233 births a year, against 205 a year across 2011–2015 — a change of +13% 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 Kooper is mostly a boy’s name — 8.6% of the 4,392 Americans given it were girls and 91.3% were boys. In births since 2016 it is 9% girls and 91% 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 4,351 Americans named Kooper are alive today — 99% of everyone ever recorded with the name. The median is 11 years old, and half are between 5 and 16. That is a narrow band because Kooper 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.
How much more common the name is in each state than across the country as a whole.
See Kooper on the interactive charts
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Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org