unisex name
Kasey
KAY-see
- Origin Irish
- Gender Unisex
- Syllables 2
- Letters 5
- Popularity Uncommon
- Births on record 50,015
Northern Ireland
#275
2014 births
Kasey means vigilant, and it is one of the more evenly divided names on this site — 73 percent of the births in our records are female, against an Irish surname that was of course carried by both.
- Kasey is a name of Irish origin.
- Peaked in 1990, when 1,800 babies were given the name.
- It has been falling over the past decade.
- Today about 1 in 11,633 babies in the United States is given this name.
- First appears in US birth records in 1950.
- 2 syllables, with the stress on syllable 1.
Kasey over time
Births per decade in the United States, 1950s to 2020s. The striped bar is the 2020s, still in progress — it covers 2020 to 2025, not a full ten years.
Show the numbers
| Decade | Births |
|---|---|
| 1950s | 116 |
| 1960s | 747 |
| 1970s | 4,468 |
| 1980s | 12,721 |
| 1990s | 14,895 |
| 2000s | 7,708 |
| 2010s | 3,596 |
| 2020s (to 2025) | 1,698 |
What Kasey means
Kasey means watchful or vigilant. The Irish word behind it describes alertness, so the sense is a disposition rather than a rank, a trade or a place.
Where Kasey comes from
Kasey respells Casey, from the Irish Ó Cathasaigh — descendant of Cathasach, built on a root meaning watchful or vigilant. The cath in it is the ordinary Irish word for a battle, which also sits inside Cathal and Cathleen. Its use as a given name is American and twentieth-century, and the K spelling is later still. Our records for this form carry it from 1950.
Kasey in use
Kasey peaked in the United States in 1990, when 1,800 babies were registered, and is falling in our data. It now ranks 664th in Ireland on 9 births, 761st in Scotland on 4, 1164th in the United States on 285 and 1783rd in England and Wales on 19, across 50,015 lifetime births in five of the seven markets we track. About 73 percent of recorded births are female.
How popular is Kasey?
In 2025, Kasey was given to 285 babies in the United States. It is used consistently but remains uncommon.
Where Kasey is used
US figures omit any name given to fewer than five babies in a year, so the rarest names are absent from the source rather than absent from use. Data & sources.
Names that peaked alongside Kasey
These names rose and fell in the same era, which is why they tend to sound like they belong together.
Parents who like Kasey also like
Names whose popularity has risen and fallen in step with Kasey over the last century — the same taste, a different name.
Kasey in other languages
The same name as it is spelled elsewhere — not shortenings, and not different names that merely sound alike. Each one has its own record here.
Sibling names for Kasey
Names from the same era that won't rhyme or share an initial with Kasey — the two things that make a sibling set grate.
Common questions about Kasey
What does the name Kasey mean?
Watchful or vigilant — the Irish Ó Cathasaigh.
Is Kasey a boys' or girls' name?
Both — about 73 percent of the births in our records are female.
Is cath a word on its own?
Yes, the Irish for a battle. It sits inside Cathal and Cathleen too.
Is it Kasey or Casey?
Casey is the older spelling; Kasey is a later American respelling.
How popular is the name Kasey?
In 2025, Kasey was given to 285 babies in the United States. It is used consistently but remains uncommon.
How many syllables are in Kasey?
Kasey has 2 syllables.
When was Kasey most popular?
Kasey peaked in 1990, when 1,800 babies were given the name. It has been falling over the past decade.
Is Kasey a good name?
That is not something records can settle, but they can tell you what you would be choosing. Kasey currently ranks #664 in the United States. It has been falling over the past decade. Everything else — how it sounds with your surname, who it reminds you of — is yours.