Kaja
The girl's name Kaja has been in the national records since 1957, with 711 births to its name. In 2025 it ranked 6,838th. About 700 Kajas are alive in the United States today, and half of them are over 21.
Popularity, 1880–2025
girls named Kaja
By the numbers
- Total US births
- 711
- Estimated living today
- 700
- Median age today
- 21
- Peak year
- 2009
- Best rank
- 5,537th
- Rank in 2025
- 6,838th
- First recorded
- 1957
How old the living Kajas are
born that year still alive today
Of the 711 babies given the name since 1957, about 700 are alive — 98 in every hundred. The dotted line is the median: half were born before 2004 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 Kajas
- Kaja Kallas (born 1977)Estonian politician and former prime minister of Estonia
- Kaja Juvan (born 2000)Slovenian tennis player
- Kaja Grobelna (born 1995)Belgian volleyball player
People named Kaja with articles in the most Wikipedia languages. Data from Wikidata (CC0).
Where Kaja is most common
Total births recorded in each state since 1910. Browse names by state.
Names of 2009
The most popular girls’ names the year Kaja peaked:
Kaja elsewhere
| Country | Spelling | Births | Best rank |
|---|---|---|---|
| Poland girls | Kaja | 24,325 birth registrations | 34th |
| Norway girls | Kaja | 4,697 | 46th |
| England and Wales girls | Kaja | 795 | 657th |
| Switzerland girls | Kaja | 268 | 445th |
| Ireland girls | Kaja | 191 | 219th |
| Denmark girls | Kaja | 138 | 47th |
| Scotland girls | Kaja | 56 | 455th |
| Belgium girls | Kaja | 34 | 831st |
| Northern Ireland girls | Kaja | 12 | 434th |
| France girls | Kaja | 5 | 6,236th |
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.
Kaja: births by region
| Region | Country | Spelling | Births | Share of the region | Best rank |
|---|---|---|---|---|---|
| German girls | Switzerland | Kaja | 262 | 0.021% | 312th |
| French girls | Switzerland | Kaja | 5 | 0.001% | 617th |
| Italian girls | Switzerland | Kaja | 1 | 0.002% | 179th |
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.
By canton, Kaja is most concentrated in Aargau, where 0.03% of children were given it – 41 of them.
Kaja: rank by region
In 2023, Kaja was given 5 times or more in 1 region of Belgium.
| Region | Spelling | Place | Children |
|---|---|---|---|
| Flanders | Kaja | 882 | 5 |
In 2025, Kaja was given 2 times or more in 16 regions of Poland.
| Region | Spelling | Place | Children |
|---|---|---|---|
| Dolnośląskie | Kaja | 29 | 97 |
| Kujawsko-Pomorskie | Kaja | 34 | 54 |
| Lubelskie | Kaja | 29 | 65 |
| Lubuskie | Kaja | 21 | 42 |
| Łódzkie | Kaja | 36 | 58 |
| Małopolskie | Kaja | 33 | 122 |
| Mazowieckie | Kaja | 38 | 160 |
| Opolskie | Kaja | 31 | 23 |
| Podkarpackie | Kaja | 28 | 81 |
| Podlaskie | Kaja | 42 | 23 |
| Pomorskie | Kaja | 35 | 74 |
| Śląskie | Kaja | 36 | 107 |
| Świętokrzyskie | Kaja | 27 | 37 |
| Warmińsko-Mazurskie | Kaja | 34 | 43 |
| Wielkopolskie | Kaja | 36 | 102 |
| Zachodniopomorskie | Kaja | 27 | 59 |
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.
Kaja by city
| City | Years | Births | Best rank |
|---|---|---|---|
| Berlin girls | 2017–2023 | 51 | 246th |
One city over a few years, so these are much smaller numbers than the national ones above and not comparable with them.
Kaja 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 girls | Kaja | 30 | 35 |
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
Kaja 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.