30,552births recorded
13Countries
1Variants
1999Peak · Slovenia
#31Slovenia 2025
Kaja is a girl name family recorded 30,552 times in 13 countries since 1957. It ranks highest today in Slovenia (#31 in 2025). Its all-time peak was in Slovenia in 1999, at 877.6 births per 100,000.
Popularity by country
Births per 100,000 newborns, all forms of the name combined.
Rank in countries that publish top lists only
All forms of Kaja
| Variants | Language | Total births | Country | Latest rank | Peak year | 10-year trend |
|---|---|---|---|---|---|---|
| Kaja | Slovene | 24,325 | 🇵🇱 Poland | #34 | 2025 | ▲ 68 % |
| Kaja | Slovene | 3,742 | 🇸🇮 Slovenia | #31 | 1999 | ▼ 32 % |
| Kaja | Slovene | 782 | 🏴 England & Wales | #1809 | 2018 | ▼ 53 % |
| Kaja | Slovene | 711 | 🇺🇸 United States | #6838 | 2012 | ▼ 2 % |
| Kaja | Slovene | 264 | 🇨🇭 Switzerland | #445 | 2025 | ▲ 85 % |
| Kaja | Slovene | 198 | 🇩🇪 Germany (large cities) | #287 | 2022 | – |
Questions about Kaja
How popular is the name Kaja?
In 2025 it ranked #31 in Slovenia. Official registers record 30,552 births across 13 countries.
When was Kaja most popular?
It peaked in Slovenia in 1999, at 877.6 births per 100,000.
Is Kaja a boy or a girl name?
In official birth registers, Kaja is a girl name.