Declining since 1989, #2,117 for girls today.
Popularity of Kaci since 1965
Babies named Kaci per year in U.S. Social Security records.
Data table (by decade)
| Decade | Girls |
|---|---|
| 1960s | 37 |
| 1970s | 619 |
| 1980s | 2,313 |
| 1990s | 2,783 |
| 2000s | 2,150 |
| 2010s | 1,460 |
| 2020s | 647 |
Meaning & origin
Kaci first appeared in U.S. birth records in 1965, a decade before the name Casey began its steep climb up the charts. The spelling variant Kaci reached its peak in 1990, when it ranked 598th nationally. Since then, its popularity has steadily declined; in 2025 it ranked 2,117th, reflecting a trajectory that has been falling since 1989. About 1 in every 18,264 baby girls received the name that year, a sharp drop from its peak usage. Geographically, Kaci has been most common in West Virginia, Kentucky, and Georgia, suggesting a stronger foothold in the South and Appalachian regions. As a respelling of Casey, it follows a broader American pattern of using phonetic spellings to create distinct given names.
Kaci is a modern American respelling of Casey, which itself derives from the Irish Gaelic surname Ó Cathasaigh, meaning 'descendant of Cathasach'. Cathasach was a personal name meaning 'vigilant' or 'watchful'. The simplified spelling Kaci emerged in the United States during the late 20th century as part of a trend toward phonetic respellings.
Where Kaci is most popular
Births per 100,000 girls by state. Press play or drag the slider to watch it move across the decades. The lightest shade means too few recorded births.
Nicknames & variants
Nicknames: Kace, Kae
Sibling names for Kaci
Names that share Kaci's style, for a brother or sister.
