Kacie

♂ Boy

Pronounced KAY-see /ˈkeɪ.si/High

Meaning: Kacie is a modern respelling of Casey/Kacey, from the Irish surname O Cathasaigh, usually read as 'vigilant' or 'watchful'. In U.S. use Kacie leans strongly to girls; here it is used for a boy, which we note.Low

In 30 seconds: A bright, friendly spelling of Casey — read as 'vigilant; watchful' (said 'KAY-see'). More often a girl's name — we note the lean.

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Origin MediumIrish, English

MeaningKacie is a modern respelling of Casey/Kacey, from the Irish surname O Cathasaigh, usually read as 'vigilant' or 'watchful'. In U.S. use Kacie leans strongly to girls; here it is used for a boy, which we note.

U.S. rank (2024)#13169 ↘ Falling

2024 U.S. births5 boys (0.00% of U.S. boys)

Peak year2022

Total births (all-time)≈ 57

Popularity in the U.S. · SSA data

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Kacie is one of the many modern respellings of Casey, itself from the Irish surname O Cathasaigh ('descendant of Cathasach', vigilant). The -ie ending pushed it toward girls, and it is used mostly for them; for a boy it reads as a soft, friendly outlier, which we note (said 'KAY-see').

Boys' use of this exact spelling is rare in the U.S., set against much heavier girls' use. Rare, cheerful, and Irish-rooted.

Did you know? Kacie traces back through Casey to the Irish name Cathasaigh, 'vigilant' — a watchful, steady root under a very cheerful sound. It is far more often a girls' spelling in the U.S., which we note (said 'KAY-see').

Overall data confidence 50%

References — Kacie — Casey/Kacey respelling; Irish Cathasaigh 'vigilant'; girl-leaning

Variations

CaseyKaceyKasey

Nicknames

KaceKC

Famous Bearers

Famous bearers coming soon.

If you like Kacie…

Casey— the classic Irish name Kacie respells

Cassidy— a like Irish surname pick that went unisex

Kai— a like short, bright K-name

Kairie— shares Kacie's English roots

Bodie— a fellow English choice

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Frequently Asked

What does the name Kacie mean?

Kacie is a respelling of Casey, from the Irish Cathasaigh, usually read as 'vigilant' or 'watchful'.

How do you pronounce Kacie?

It's said KAY-see /ˈkeɪ.si/ — two syllables, stress on the first.

Is Kacie a boy or girl name?

Here Kacie is used as a boy's name, though it is more often a girl's name — we note the lean.

How popular is Kacie?

Kacie is rare for boys in the U.S. and much more common for girls.