Casey
Gender: Mostly Boy
Meaning: Vigilant, watchful, brave in battle
Origin: Irish Gaelic
Popularity: Ranked #320 in 2025 with 1,072 babies born.
History: Casey is an anglicization of the Irish 'Ó Cathasaigh,' meaning descendant of Cathsach, which relates to vigilance or wakefulness. It became popular in the United States through folk hero Casey Jones and is used for both boys and girls.
Name length: 5 letters
How common is Casey? About 1 in 2,560 babies born in 2025 were named Casey, or roughly 3.6 per day in the United States.
Explore more baby names at BabyNa.me — 29,000+ names with meanings, origins, and popularity trends.
Loading name...
Frequently asked about Casey
What does the name Casey mean?
Casey means “Vigilant, watchful, brave in battle” from Irish Gaelic roots.
What is the origin of the name Casey?
Casey has Irish Gaelic origin. The traditional meaning is “Vigilant, watchful, brave in battle”.
How popular is Casey?
Casey ranked #320 in 2025 — given to 1,072 babies that year.
When was Casey most popular?
Casey peaked in 1990 with 4,133 babies registered that year.
Is Casey a boy or girl name?
Casey is used for both boys and girls. In the records, about 60% of Caseys are boys and 40% are girls.
Is the name Casey rising or falling in popularity?
Casey has risen 743 spots in the rankings over the last 5 years — from #1063 in 2020 to #320 in 2025.
How long has Casey been recorded?
Casey appears in birth records across 132 years — from 1888 through 2025.