Kacper
Kacper is a boy's name that peaked in 2007, when it was the 1,713th most popular in the United States. In 2025 it ranked 7,194th. About 1,100 Kacpers are alive in the United States today, and half of them are over 17.
Popularity, 1880–2025
boys named Kacper
By the numbers
- Total US births
- 1,102
- Estimated living today
- 1,100
- Median age today
- 17
- Peak year
- 2007
- Best rank
- 1,713th
- Rank in 2025
- 7,194th
- First recorded
- 1994
How old the living Kacpers are
born that year still alive today
Of the 1,102 babies given the name since 1994, about 1,100 are alive — 99 in every hundred. Roughly 600 of them are children and 0 are 65 or over. The dotted line is the median: half were born before 2008 and half after.
An estimate, not a count. SSA births aged forward through SSA cohort life tables, which know nothing about who left the country or arrived in it — so for a name that mostly came to America rather than being born in it, this is a floor rather than a figure. Where you fall among living Americans.
Notable Kacpers
- Kacper Kozłowski (born 2003)Polish association football player
- Kacper Urbański (born 2004)Polish association football player
- Kacper Przybyłko (born 1993)Polish footballer
- Kacper Kozłowski (born 1986)Polish sprinter
- Kacper Piorun (born 1991)Polish chess grandmaster
- Kacper Kazimierz Cieciszowski (1745–1831)archbishop
People named Kacper with articles in the most Wikipedia languages. Data from Wikidata (CC0).
Where Kacper is most common
Relative to how many babies each state records, Kacper is most concentrated in Illinois (13.0×), New Jersey (3.3×), New York (3.1×).
Total births recorded in each state since 1910. Browse names by state.
Names of 2007
The most popular boys’ names the year Kacper peaked:
Kacper elsewhere
| Country | Spelling | Births | Best rank |
|---|---|---|---|
| Poland boys | Kacper | 201,609 birth registrations | 2nd |
| England and Wales boys | Kacper | 4,408 | 172nd |
| Ireland boys | Kacper | 848 | 92nd |
| Norway boys | Kacper | 612 | 173rd |
| Scotland boys | Kacper | 428 | 128th |
| Belgium boys | Kacper | 282 | 409th |
| France boys | Kacper | 165 | 2,238th |
| Northern Ireland boys | Kacper | 161 | 136th |
| Switzerland boys | Kacper | 58 | 935th |
Counts come from each country's own records and are not comparable with the US figures above, which cover different years and a different definition of a recorded name. Where a country writes the name several ways, the spellings are added together and the most common is shown. A row marked name registrations is counting something else: Portugal ranks each of a child's two given names separately, so a girl registered Maria Leonor is in both the Maria row and the Leonor row, and that figure is not a number of children.
Kacper: births by region
| Region | Country | Spelling | Births | Share of the region | Best rank |
|---|---|---|---|---|---|
| German boys | Switzerland | Kacper | 45 | 0.004% | 787th |
| French boys | Switzerland | Kacper | 13 | 0.003% | 473rd |
Parts of a country counted above, not extra births. The share is what makes the regions comparable: they differ in size by a factor of three hundred.
Kacper: rank by region
In 2024, Kacper was given 5 times or more in 1 region of Belgium.
| Region | Spelling | Place | Children |
|---|---|---|---|
| Flanders | Kacper | 577 | 9 |
In 2025, Kacper was given 2 times or more in 16 regions of Poland.
| Region | Spelling | Place | Children |
|---|---|---|---|
| Dolnośląskie | Kacper | 18 | 135 |
| Kujawsko-Pomorskie | Kacper | 22 | 90 |
| Lubelskie | Kacper | 25 | 84 |
| Lubuskie | Kacper | 23 | 36 |
| Łódzkie | Kacper | 20 | 118 |
| Małopolskie | Kacper | 17 | 252 |
| Mazowieckie | Kacper | 25 | 260 |
| Opolskie | Kacper | 15 | 54 |
| Podkarpackie | Kacper | 19 | 121 |
| Podlaskie | Kacper | 25 | 50 |
| Pomorskie | Kacper | 27 | 104 |
| Śląskie | Kacper | 14 | 227 |
| Świętokrzyskie | Kacper | 17 | 62 |
| Warmińsko-Mazurskie | Kacper | 24 | 50 |
| Wielkopolskie | Kacper | 21 | 164 |
| Zachodniopomorskie | Kacper | 17 | 78 |
In 2018, with the country taken in 11 areas rather than 3, Kacper appears in the lists for Province of Antwerp (286th).
Each of these is the top of a list the statistics office cut off somewhere – Belgium below 5 children, Poland below 2 children – and published nothing after. So a region missing here is one where the name fell outside what was published, not one where it went unused. Places are shared where names tie, and the further down a list a place is, the more names can share it.
Kacper by city
| City | Years | Births | Best rank |
|---|---|---|---|
| Berlin boys | 2017–2023 | 12 | 451st |
One city over a few years, so these are much smaller numbers than the national ones above and not comparable with them.
Kacper among the living
How many people each country's register counts under the name, rather than how many were given it in any one year. Each register was read on one date, and they are not the same date.
| Country | Spelling | First forename | Any forename |
|---|---|---|---|
| Finland boys | Kacper | 11 | 12 |
A count of people on a register – Finland on 4 August 2026 – and not of births, so it cannot be compared with the figures above. Names with very few bearers are withheld, and a dash in the first-forename column means the register would not say rather than that nobody goes by it.
Related names
Kacper against another name
Two names on one chart, with the year one overtook the other.
Try it on yourself
Source: US Social Security Administration, national and state baby-name files, 1880–2025. Counts include only births registered with the SSA, and names with fewer than five births in a year are not published. The living estimate applies SSA cohort life tables to those births; it counts people born in the United States, so it misses anyone who arrived later and anyone who has left.