Kasey
Feminine · “vigilant”
Kasey is given to both — 33,326 girls and 12,623 boys since 1880. See Kasey as a boy nameSee other names given to both
Kasey is an Irish surname respelled with a K. Ó Cathasaigh means descendant of the vigilant one, and the name reached American girls through Casey, which was a boy's name first.
How old is the name Kasey?
Kasey first appears in US birth records in 1950 — 75 years ago. The typical Kasey alive today was born around 1992, making them about 33 years old. About 32,500 people named Kasey are estimated to be alive in the US today.
When was the name Kasey most popular?
Kasey peaked in 1988, reaching #201 nationally. Today it ranks #1872, 1,671 places below that high. See the whole 1988 chart.
Lists built from the same records:
Where it comes from
From cathasach to Kasey
The story of Kasey
Ó Cathasaigh families were prominent in several Irish counties, and emigration made Casey a common American surname. It crossed into given-name use in the twentieth century — helped by the ballad of Casey Jones, the engineer killed in 1900 — and moved to girls in the 1970s. The K respelling followed, and Kasey peaked in the mid-1980s.
Meaning
vigilant, watchful
From the Irish surname Ó Cathasaigh, 'descendant of Cathasach' — a personal name from cathasach, 'vigilant' or 'watchful'. The element cath, 'battle', sits inside it. The derivation is well documented, unusually for an Irish surname-name.
How the name formed
- cathasach
- Ó Cathasaigh
- Casey
- Kasey
Related forms: Cathasach · Casey · Kacey
Pronouncing Kasey
KAY-see
Two syllables, stress on the first. All the spellings are said identically.
Nicknames for Kasey
Moderate
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1950
- Most girls named
- 19921,394 — the highest on record
- Peak rank
- #201reached in 1988
- Change vs 2024
- −20.5%105 in 2025, from 132
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Kasey in other languages
The same name elsewhere
- Cathasach in Irish — related form
- Casey in English — spelling variant
- Kacey in English — spelling variant
Strongest US states over the last decade: California, Texas, New York.
Kaseys among us
people named Kasey are estimated to be alive in the US today
About 1 girl in 15,307 born in 2025 was named Kasey
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Kasey
- #1872
- Kasey on the 2025 chart
- #494
- counting every spelling
The SSA counts spellings, not names. Kasey went to 105 girls in 2025, but Casey and Kacey are the same name said out loud. Together the 3 spellings went to 544, which makes it the 494th most-given girls’ name of the year — 1,378 places above the chart.
About 1 girl in 2,955 born in 2025 was given one of these spellings — against 1 in 15,307 for Kasey itself.
Spellings are grouped by a fixed rule that folds interchangeable English spellings of one sound (ck/k, ph/f, x/ks, a non-initial y for i) and keeps vowels apart, so Sean and Shawn stay separate names. It errs towards splitting: a family here is never larger than the truth. SSA national data, 2025. Method
Is it right for you
What happens to a name after it peaks
The Leigh test
Every popular name lives one long story — a climb, a peak, a slow settling back. Kasey's later chapters haven't been written yet, so we borrowed them: Leigh climbed just as high around 1969, and its whole arc is on record. Line the two peaks up, and Leigh's path sketches the road Kasey is walking now.
Kasey sits in the calm middle of the cycle — neither chasing a wave nor sliding off one. Middle-of-the-cycle names age slowly and predictably.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Where Kasey is headed
Kasey should hold steady through 2030 — the curve is flat, and flat curves are the most predictable kind.
High confidence — fitted on official counts through 2025.
A damped-trend projection of the official birth data — a sketch of momentum, not a promise. Every name's forecast, ranked.
Kasey beside its neighbors
The names ranked closest to Kasey in 2025, in babies rather than position — the bars are to scale.
US girls given each name in 2025.
The trade-off
- The vigilant meaning is transparent and unusually well documented for an Irish surname-name.
- It works for either sex, which some families specifically want.
- Bright and quick, with no pronunciation risk.
- Several spellings are in use and Casey is much the commonest.
- It is thoroughly unisex and does not signal sex on paper.
- It is closely dated to the 1980s in American records.
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What they receive
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Kasey
Feminine · #1872 in the U.S.
Frequently asked
- How many Kaseys are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 32,500 people named Kasey are estimated to be alive in the US today.
- How do you spell Kasey?
- Kasey is one of 3 recorded spellings. Casey is the more common one — 228 births in 2025 against 105 for Kasey.
- How popular is the name Kasey in 2025?
- Kasey ranks #1872 among US girl names in 2025, with 105 babies given the name.
- How rare is the name Kasey?
- About 1 in every 15,307 US girls born in 2025 was named Kasey — 105 in all.
- Will my child share the name Kasey with classmates?
- Kasey will almost certainly be the only one in school.
Ranked beside Kasey
Names sitting at a similar level of popularity right now.
Aleya#1872 · Alessa#1872 · Sidney#1872 · Judy#1872 · Rio#1872 · Vallie#1872 · Karmen#1872 · Khalia#1867
Looking for what else is popular rather than what resembles Kasey? See the current top 100.
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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