By decade. Change compares yearly averages, so the current partial decade is on equal
footing. Best rank is the name's best yearly rank within the decade.
Where Kooper is most popular
Boys named Kooper per 1,000 boys born in
each state, 2021–2025. National average: 0.122 per 1,000.
Strongest in Oklahoma, Iowa, and Missouri.
Vs national average well below below near national above well above no data
All 50 states and DC, sorted by rate. Counts are boys named Kooper born
2021–2025; the per-1,000 rate makes states of different sizes
comparable, and the last column shows each state against the national average.
State counts come from the Social Security Administration's state files, which omit any
state-year with fewer than five babies of a name, so small states can undercount slightly.
The story of Kooper
Kooper is uncommon for boys in the United States, ranked #1,024 in 2025 with 218 babies given the name. It is currently rising compared with a decade ago.
Since 1990, 4,392 American babies have been named Kooper, about 91% boys and 9% girls, making it a genuinely unisex name. Its peak came in 2022, when 257 newborns received the name, the signature sound of the 2020s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Kooper stood among all boys' names in any year, or use the compare tool to plot it against other names.