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Casey vs Sullivan

Baby Name Comparison — 2026

Popularity Comparison

Casey Rank #310
Sullivan Rank #340

Casey is more popular, ranked #310 vs #340 for Sullivan.

Frequently Asked Questions

Is Casey or Sullivan more popular?

Casey is more popular, ranked #310 compared to Sullivan at #340 in the United States.

What do Casey and Sullivan mean?

Sullivan means "descendant of the dark one" (Irish Gaelic origin).

Are Casey and Sullivan boy or girl names?

Casey is primarily a boy name. Sullivan is primarily a boy name.

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← Full profile: Casey ← Full profile: Sullivan Browse all baby names