Cassidy Girl
How popular is Cassidy?
#541 girl name in 2025
558 baby girls were named Cassidy in the US in 2025, making it the 541st most popular girl name. Another 51 boys got the name (#2,572 for boys).
Cassidy popularity over time
Boys Girls
| Rank in 2025 | #541 for girls (▼ 63 from 2024) |
|---|---|
| Babies in 2025 | 558 girls, 51 boys |
| 10-year trend | Falling fast (-55% babies vs 2015) |
| Earlier ranks | #257 in 2015, #411 in 2020 |
| Peak year | 1999 (3,395 girls) |
| Highest rank | #99 in 1999 |
| First recorded | 1969 |
| Boys vs girls (last 10 years) | 7% boys, 93% girls |
| Chance a classmate shares it | 0.4% in a class of 25 kids born in 2025 |
Cassidy counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Cassidy family of names ranked #385 for girls in 2025 (#346 the year before), with 819 babies in all.
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Cassidy is most popular
Babies named Cassidy per 1,000 girls born in each state, 2021 to 2025. Darker means more common.
- Maryland: 0.8 per 1,000 (87 girls)
- Pennsylvania: 0.8 per 1,000 (183 girls)
- New Jersey: 0.8 per 1,000 (136 girls)
- Colorado: 0.7 per 1,000 (77 girls)
- Massachusetts: 0.7 per 1,000 (81 girls)
Cassidy by decade
| Decade | Baby girls | Best rank |
|---|---|---|
| 1960s | 5 | #7,469 |
| 1970s | 523 | #1,204 |
| 1980s | 3,341 | #487 |
| 1990s | 20,659 | #99 |
| 2000s | 21,180 | #107 |
| 2010s | 11,235 | #247 |
| 2020s | 3,905 | #411 |
Girl names about as popular as Cassidy
Questions
- Is Cassidy a boy or girl name?
- Cassidy is mostly a girl name. Over the last 10 years, 93% of babies named Cassidy were girls.
- How popular is the name Cassidy?
- 558 baby girls were named Cassidy in the US in 2025, making it the 541st most popular girl name. Another 51 boys got the name (#2,572 for boys).
- When was Cassidy most popular?
- Cassidy peaked in 1999, when 3,395 girls were given the name. Its highest rank was #99 in 1999.
- How many people are named Cassidy?
- 64,583 babies have been named Cassidy in the US since 1880. We estimate about 63,744 of them are alive in 2026, with a median age of 25.
- Where is Cassidy most popular?
- From 2021 to 2025, Cassidy was most common in Maryland, at 0.8 of every 1,000 girls born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.