Casey

unisexIrish

Casey is an unisex name of Irish origin, meaning “Vigilant, watchful”.

MeaningVigilant, watchful
GenderUnisex
OriginIrish
PronunciationKAY-see
TraditionModern & Classic
Used inUnited States, Ireland, Australia, Canada

Meaning and origin of Casey

Casey is an anglicised form of the Irish surname O Cathasaigh, from cathasach, usually interpreted as 'vigilant' or 'watchful', though some sources link it to cath, 'battle'. It became a first name partly through Casey Jones, the American railroad engineer who died in a famous train wreck in 1900. Today it is used for both boys and girls.

Is Casey a religious name?

Casey has no religious background; it is an Irish surname used as a first name.

How popular is Casey?

Used for both genders, most popular in the 1980s and 1990s.

Gifts with the name Casey

As an Amazon Associate we earn from qualifying purchases. We may earn a small commission from these links, at no extra cost to you.

Spellings and variants of Casey

KaseyKaceyCasy

Names similar to Casey

More unisex names

Frequently asked questions

What does the name Casey mean?

Casey means 'Vigilant, watchful'. It is of Irish origin.

Does Casey have a religious meaning?

Casey has no religious background; it is an Irish surname used as a first name.

How do you pronounce Casey?

Casey is pronounced KAY-see.

Is Casey a boy or girl name?

Casey is used for both boys and girls.

Updated October 2026. Spotted a mistake? Tell us.