Kaja is a rare girls' name that peaked in 2009 and remains in steady use.
Kaja is a girl name. In 2025 it ranked #6,973 for girl births in the United States (and #12,056 across all names), given to 16 babies. Kaja first appears in 1957 and peaked in 2009 (25 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 16 | 16 | #6,973 |
| 2024 | 19 | 19 | #6,275 |
| 2023 | 18 | 18 | #6,536 |
| 2022 | 13 | 13 | #8,265 |
| 2021 | 14 | 14 | #7,817 |
| 2020 | 12 | 12 | #8,659 |
| 2019 | 13 | 13 | #8,352 |
| 2018 | 13 | 13 | #8,347 |
| 2017 | 19 | 19 | #6,402 |
| 2016 | 18 | 18 | #6,776 |
| 2015 | 18 | 18 | #6,849 |
| 2014 | 16 | 16 | #7,472 |
| 2013 | 13 | 13 | #8,799 |
| 2012 | 25 | 25 | #5,473 |
| 2011 | 18 | 18 | #6,972 |
| 2010 | 22 | 22 | #6,054 |
| 2009 | 25 | 25 | #5,621 |
| 2008 | 12 | 12 | #9,763 |
| 2007 | 14 | 14 | #8,766 |
| 2006 | 24 | 24 | #5,626 |
| 2005 | 9 | 9 | #11,340 |
| 2004 | 21 | 21 | #5,844 |
| 2003 | 17 | 17 | #6,739 |
| 2002 | 18 | 18 | #6,260 |
| 2001 | 14 | 14 | #7,512 |
| 2000 | 21 | 21 | #5,396 |
| 1999 | 18 | 18 | #5,771 |
| 1998 | 18 | 18 | #5,688 |
| 1997 | 15 | — | #6,319 |
| 1996 | 10 | — | #8,461 |
| 1995 | 14 | — | #6,415 |
| 1994 | 13 | — | #6,859 |
| 1993 | 12 | — | #7,236 |
| 1992 | 14 | — | #6,458 |
| 1991 | 11 | — | #7,639 |
| 1990 | 16 | — | #5,667 |
| 1989 | 11 | — | #7,192 |
| 1988 | 10 | — | #7,371 |
| 1987 | 12 | — | #6,093 |
| 1986 | 9 | — | #7,389 |
| 1985 | 8 | — | #7,894 |
| 1983 | 7 | — | #8,432 |
| 1982 | 10 | — | #6,569 |
| 1981 | 13 | — | #5,401 |
| 1980 | 5 | — | #11,096 |
| 1978 | 7 | — | #8,007 |
| 1974 | 9 | — | #5,968 |
| 1972 | 5 | — | #8,830 |
| 1967 | 5 | — | #7,252 |
| 1966 | 6 | — | #6,127 |
| 1961 | 6 | — | #6,172 |
| 1957 | 5 | — | #6,540 |