girl's name · in the US
Cassidy
KASS-i-dee (English)
- Origin Irish
- Gender Girl (US)
- Syllables 3
- Letters 7
- Popularity Top 1000 (US)
- Births on record 74,441
the United States
#541
2025 births
Cassidy means curly-haired, from an Irish surname — and Scotland ranks it 416th, above Northern Ireland at 464th and the United States at 541st, with Ireland itself back at 807th. Ireland itself sits back at 807th.
- Cassidy is a name of Irish origin.
- Peaked in 1999, when 3,449 babies were given the name.
- It has been falling over the past decade.
- Today about 1 in 5,444 babies in the United States is given this name.
- First appears in US birth records in 1968.
- 3 syllables, with the stress on syllable 1.
Cassidy Over Time
Births per decade in the United States, 1960s to 2020s. The striped bar is the 2020s, which so far covers 2020 to 2025.
Show the numbers
| Decade | Births |
|---|---|
| 1960s | 15 |
| 1970s | 874 |
| 1980s | 4,477 |
| 1990s | 21,559 |
| 2000s | 21,661 |
| 2010s | 11,788 |
| 2020s (to 2025) | 4,209 |
What Cassidy Means
Cassidy means curly-haired, or descendant of the curly-haired one. The Irish cas means curly or twisted, so the byname describes hair rather than character or character.
Where Cassidy Comes From
Cassidy anglicizes the Irish Ó Caiside — descendant of Caiside, built on cas, curly or twisted. The family were hereditary physicians to the Maguires of Fermanagh, one of several Irish lineages that held a profession across generations, as the Ó Dálaigh held poetry. Its use as a given name is late twentieth-century American and predominantly female, which is the usual route for an Irish surname crossing over.
Cassidy in Use
Cassidy peaked in the United States in 1999, when 3,449 babies were registered, and is falling. It charts in all seven markets — 416th in Scotland on 8 births, 464th in Northern Ireland, 541st in the United States on 609, 759th in Canada, 807th in Ireland, 810th in England and Wales on 50 and 1,692nd in France — across 74,441 lifetime births. About 94 percent of recorded births are female.
How Popular Is Cassidy?
In 2025, Cassidy was given to 609 babies in the United States, ranking #541 that year. It ranks among the top 1,000 names in the United States.
Where Cassidy Is Used
US figures omit any name given to fewer than five babies in a year, so the rarest names are absent from the source rather than absent from use. Data & sources.
Names That Peaked Alongside Cassidy
These names rose and fell in the same era, which is why they tend to sound like they belong together.
Parents Who Like Cassidy Also Like
Names whose popularity has risen and fallen in step with Cassidy over the last century — the same taste, a different name.
Boys' or Girls' Name?
Cassidy is used differently depending on where you are. Each figure is the share of babies given the name who were girls, over the last ten years of that country's records.
- United States Girls' 93% girls · 8,329 babies
- Canada Girls' 95% girls · 820 babies
- England & Wales Both 80% girls · 639 babies
- France Girls' 96% girls · 370 babies
- Scotland Girls' 100% girls · 60 babies
How to Say Cassidy
- English KASS-i-dee /ˈkæs.ɪ.di/
1 nickname for Cassidy
Each one is a name in its own right — the figure underneath is how it is doing today, so you can see which short forms are rising and which have faded.
Cassidy in Other Languages
The same name as it is spelled elsewhere — not shortenings, and not different names that merely sound alike. Each one has its own record here.
- Other forms
- Forms we hold no single language for — some are used across several, some are simply spelled differently.
- Cassidee
Sibling Names for Cassidy
Names from the same era that do not rhyme or share an initial with Cassidy — the two things that make a sibling set grate.
Common Questions About Cassidy
What does the name Cassidy mean?
Curly-haired — the Irish cas, curly, with a descendant prefix.
Were the Cassidys physicians?
Hereditary physicians to the Maguires of Fermanagh, across generations.
Is Cassidy a girls' name?
About 94 percent of recorded births are female.
Where is Cassidy used?
All seven markets, strongest in Scotland at 416th.
How popular is the name Cassidy?
In 2025, Cassidy was given to 609 babies in the United States, ranking #541 that year. It ranks among the top 1,000 names in the United States.
How many syllables are in Cassidy?
Cassidy has 3 syllables.
When was Cassidy most popular?
Cassidy peaked in 1999, when 3,449 babies were given the name. It has been falling over the past decade.
What are the nicknames for Cassidy?
Cassidy is usually shortened to Cass.
Is Cassidy a good name?
That is not something records can settle, but they can tell you what you would be choosing. Cassidy currently ranks #416 in the United States. It has been falling over the past decade. Everything else — how it sounds with your surname, who it reminds you of — is yours.