Kaci
- Gender
- Mostly girls
- Say it
- KAY-see
- Origin
- Irish
- US rank, 2025
- #2,117 for girls
Kaci is a name of Irish origin, meaning “vigilant”. In 2025 it ranked 2,117th for girls in the US (88 babies).
What does Kaci mean?
Irish: spelling of Casey, from Ó Cathasaigh
“vigilant”
A spelling of Casey, from the Irish surname Ó Cathasaigh, based on cathasach 'vigilant'.
Is Kaci a girl's or a boy's name?
In recent years, Kaci has been given to girls and boys, mostly girls. In 2025, it was given to 88 girls and 11 boys in the US.
How popular is Kaci in the UK?
No girls in the UK were given it in 2025, or too few to be listed. Its busiest year was 2002, with 249 girls.
Half of all the girls named Kaci in the UK since 1996 were born between 2003 and 2010, the years shaded on the chart below.
In 2021, 62% of the babies named Kaci in the UK were girls.
Kaci in the UK, year by year
| Year | Girls | Rank |
|---|---|---|
| 2024 | 12 | #2,323 |
| 2023 | 11 | #2,481 |
| 2022 | 6 | #3,728 |
| 2021 | 8 | #3,082 |
| 2020 | 10 | #2,566 |
| 2019 | 11 | #2,420 |
| 2018 | 20 | #1,628 |
| 2017 | 23 | #1,497 |
| 2016 | 37 | #1,037 |
| 2015 | 52 | #799 |
| 2014 | 47 | #874 |
| 2013 | 71 | #631 |
| 2012 | 91 | #523 |
| 2011 | 126 | #400 |
| 2010 | 114 | #423 |
| 2009 | 123 | #392 |
| 2008 | 169 | #313 |
| 2007 | 164 | #312 |
| 2006 | 182 | #286 |
| 2005 | 174 | #284 |
| 2004 | 154 | #303 |
| 2003 | 210 | #239 |
| 2002 | 249 | #187 |
| 2001 | 158 | #284 |
| 2000 | 4 | #3,399 |
| 1999 | 0 | – |
| 1998 | 3 | #4,026 |
How popular is Kaci in the US?
- Rank in 2025
- #2,117among girls
- Babies in 2025
- 88about 1 in 18,000 girls
- Five-year trend
- Fallingdown 29% in five years
- Same name in a class
- under 1%chance among 15 girls
In 2025, 88 girls in the US were named Kaci, making it the 2,117th most popular name for girls. Five years earlier, in 2020, it was 1,642nd. Its busiest year was 1990, with 362 girls. It first appears in the records in 1965. 11 boys were also named Kaci in 2025 (7,190th for boys).
It has been given to fewer girls each year for the last 3 years. 2025 had fewer girls named Kaci than any year since 1977.
Half of all the girls named Kaci in the US since 1880 were born between 1988 and 2007, the years shaded on the chart below.
In 2025, 1,196 girls in the US were given Kaci or a name that sounds the same. With every name's spellings counted this way, that ranks #284, up from #2,117 for this spelling alone.
In 2025, 89% of the babies named Kaci in the US were girls.
Kaci in the US, year by year
| Year | Girls | Rank |
|---|---|---|
| 2025 | 88 | #2,117 |
| 2024 | 93 | #2,067 |
| 2023 | 107 | #1,865 |
| 2022 | 123 | #1,692 |
| 2021 | 110 | #1,830 |
| 2020 | 126 | #1,642 |
| 2019 | 138 | #1,560 |
| 2018 | 143 | #1,520 |
| 2017 | 142 | #1,545 |
| 2016 | 165 | #1,406 |
| 2015 | 140 | #1,566 |
| 2014 | 127 | #1,665 |
| 2013 | 145 | #1,514 |
| 2012 | 129 | #1,651 |
| 2011 | 151 | #1,480 |
| 2010 | 180 | #1,307 |
| 2009 | 157 | #1,478 |
| 2008 | 190 | #1,309 |
| 2007 | 182 | #1,332 |
| 2006 | 234 | #1,083 |
| 2005 | 245 | #994 |
| 2004 | 243 | #978 |
| 2003 | 240 | #966 |
| 2002 | 206 | #1,043 |
| 2001 | 229 | #957 |
| 2000 | 224 | #951 |
| 1999 | 255 | #846 |
| 1998 | 281 | #765 |
| 1997 | 255 | #812 |
| 1996 | 263 | #791 |
| 1995 | 220 | #870 |
| 1994 | 234 | #850 |
| 1993 | 293 | #723 |
| 1992 | 288 | #733 |
| 1991 | 332 | #659 |
| 1990 | 362 | #619 |
| 1989 | 348 | #609 |
| 1988 | 318 | #624 |
| 1987 | 287 | #655 |
| 1986 | 302 | #620 |
| 1985 | 213 | #785 |
| 1984 | 195 | #810 |
| 1983 | 188 | #816 |
| 1982 | 158 | #942 |
| 1981 | 140 | #1,025 |
| 1980 | 164 | #917 |
| 1979 | 143 | #995 |
| 1978 | 100 | #1,241 |
| 1977 | 78 | #1,429 |
| 1976 | 60 | #1,638 |
| 1975 | 62 | #1,586 |
| 1974 | 50 | #1,772 |
| 1973 | 43 | #1,913 |
| 1972 | 32 | #2,311 |
| 1971 | 32 | #2,375 |
| 1970 | 19 | #3,311 |
| 1969 | 5 | #7,469 |
| 1968 | 13 | #3,788 |
| 1967 | 8 | #4,981 |
| 1966 | 6 | #5,808 |
| 1965 | 5 | #6,538 |
Names like Kaci
Names given in the same years and the same naming tradition, with a similar sound.
Teagan Cassidy Devyn Brynn Keegan Codi Kodi Kaitlyn Keely Mckenna Regan Ashlyn
Other spellings of Kaci
Casey Kacey Kaycee Kacie Kasey Kayce Keisy Kaycie Keysi Kayci Kaysi
Names related to Kaci
More Irish names
Oscar Rowan Rory Maeve Finn Aiden Ryan Nolan Quinn Orla Cody Erin Ronan Connor Declan Kennedy
Sources
Figures from Baby names in England and Wales (Office for National Statistics), Babies' first names (National Records of Scotland), Baby names (Northern Ireland Statistics and Research Agency) and Popular Baby Names (US Social Security Administration). Nameling last updated them on 20 October 2026. How the figures are worked out, and the data to download.
To cite this page: Nameling, “Kaci: name meaning, origin and popularity”, https://www.nameling.co.uk/names/kaci, updated 20 October 2026.