Casidy
- US rank
- Unranked
- Syllables
- 3
- Peak
- #4,564 in 2001
0 babies were named Casidy in the US in 2025.
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US births per million girls, 1980–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Casidy you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryCasidy first shows up in US birth records in 1980, the first year at least 5 babies got it. It has been in use for 45 years since.
- Best yearIts best year was 2001, when it reached #4,564.
About the name Casidy
Casidy is a girl name of Irish origin. It has 6 letters and 3 syllables, starting with C and ending in “-idy”. US birth records list Casidy for girls from 1980 to 2016, in 31 of those 37 years. Its best year was 2001, when it ranked #4,564 among girl names. It hasn't been given to 5 or more US babies in a year since 2016, so today it's a genuinely rare choice.
Origin:Irish names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1980s | 2.0 | 507,614 girls |
| 1990s | 6.5 | 153,139 girls |
| 2000s | 7.9 | 126,743 girls |
| 2010s | 4.2 | 236,486 girls |
Other spellings of Casidy
More Irish girl names
- Girl name: Abigail · my father is joy
- Unisex name: Riley · rye clearing
- Girl name: Maeve · she who intoxicates
- Unisex name: Kennedy · helmeted head
- Unisex name: Rylee · rye clearing
- Unisex name: Sloane · raider
- Unisex name: Alani · orange tree
- Girl name: Everleigh · boar clearing
Questions about the name Casidy
What is the origin of the name Casidy?
Casidy has Irish roots in our records. Other Irish names include Abigail, Riley, Maeve.
Is Casidy a boy or girl name?
Casidy is a girl name.
How popular is the name Casidy?
Casidy is rare: fewer than 5 US girls got it in 2025, and it was last given to 5 or more in 2016. It peaked at #4,564 in 2001.