Kacie
Feminine · “vigilant”
Kacie is overwhelmingly a girls’ name — 12,782 girls against 57 boys since 1880.
Kacie respells Casey, and the Irish behind it is Ó Cathasaigh — descendant of the vigilant one, from cathasach, watchful.
How old is the name Kacie?
Kacie first appears in US birth records in 1966 — 59 years ago. The typical Kacie alive today was born around 1995, making them about 30 years old. About 12,500 people named Kacie are estimated to be alive in the US today.
When was the name Kacie most popular?
Kacie peaked in 1984, reaching #482 nationally. Today it ranks #1867, 1,385 places below that high. See the whole 1984 chart.
Where it comes from
From cathasach to Kacie
The story of Kacie
Ó Cathasaigh families were recorded in Dublin, Limerick and Monaghan. Casey Jones, the engineer who died at his brake in 1900, made the surname an American byword. The name entered given-name use for both sexes, and Kacie appears in the American registers from the 1980s in current use.
Meaning
vigilant, watchful
From the Irish Ó Cathasaigh, from cathasach, 'vigilant' or 'watchful', built on cath, 'battle'. The surname is documented in several Irish counties. The elements are ordinary Irish and the reading undisputed. The K spelling is a modern American respelling.
How the name formed
- cathasach
- Ó Cathasaigh
- Casey
- Kacie
Related forms: Casey · Kacey · Ó Cathasaigh
Pronouncing Kacie
KAY-see
Two syllables, stress on the first. All the spellings of the sound are said identically.
Nicknames for Kacie
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
- 1966
- Most girls named
- 1992476 — the highest on record
- Peak rank
- #482reached in 1984
- Change vs 2024
- −7.0%106 in 2025, from 114
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.
Kacie in other languages
The same name elsewhere
- Casey in English — spelling variant
- Kacey in English — spelling variant
- Ó Cathasaigh in Irish — related form
Strongest US states over the last decade: Texas, California, Pennsylvania.
Kacies among us
people named Kacie are estimated to be alive in the US today
About 1 girl in 15,163 born in 2025 was named Kacie
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Kacie
- #1867
- Kacie on the 2025 chart
- #839
- counting every spelling
The SSA counts spellings, not names. Kacie went to 106 girls in 2025, but Kasie and Casie are the same name said out loud. Together the 3 spellings went to 121, which makes it the 839th most-given girls’ name of the year — 1,028 places above the chart.
About 1 girl in 13,283 born in 2025 was given one of these spellings — against 1 in 15,163 for Kacie 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 Johnie test
Every popular name lives one long story — a climb, a peak, a slow settling back. Kacie's later chapters haven't been written yet, so we borrowed them: Johnie climbed just as high around 1907, and its whole arc is on record. Line the two peaks up, and Johnie's path sketches the road Kacie is walking now.
Kacie 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 Kacie is headed
Kacie should hold steady through 2030 — the curve is flat, and flat curves are the most predictable kind.
Medium 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.
Kacie beside its neighbors
The names ranked closest to Kacie 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 belongs to a documented Irish family.
- Kace and KC are two short forms, both with real use.
- Two clean syllables with no pronunciation risk.
- At least four spellings of the sound are in common use.
- Casey is the standard spelling and reads as unisex.
- It will be respelled by other people constantly.
Nobody names a baby alone.
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What they receive
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Kacie
Feminine · #1867 in the U.S.
Frequently asked
- How many Kacies are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 12,500 people named Kacie are estimated to be alive in the US today.
- How do you spell Kacie?
- Kacie is the most-used spelling in US records — 106 of the 121 babies given the name in 2025. The others recorded are Kasie and Casie.
- How popular is the name Kacie in 2025?
- Kacie ranks #1867 among US girl names in 2025, with 106 babies given the name.
- How rare is the name Kacie?
- About 1 in every 15,163 US girls born in 2025 was named Kacie — 106 in all.
- Will my child share the name Kacie with classmates?
- Kacie will almost certainly be the only one in school.
Ranked beside Kacie
Names sitting at a similar level of popularity right now.
Solei#1867 · Khalia#1867 · Emilee#1867 · Nairobi#1867 · Vallie#1872 · Kasey#1872 · Karmen#1872 · Judy#1872
Looking for what else is popular rather than what resembles Kacie? See the current top 100.
Choosing between Kacie and another name?
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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