Cassidy
Girl name · #541 in 2025 · Rare
Cassidy is currently the #541 girl name in the United States — 558 babies received it in 2025. A decade ago it stood at #257, so the name has been falling over the past ten years. Roughly one in every 3,226 girls born in 2025 was named Cassidy.
The 56-year story
Cassidy first appears in the Social Security records in 1969, when 5 girls received the name. Its peak came in 1999, when 3,395 girls were named Cassidy — good for #99 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Babies named Cassidy per year. Source: SSA.
Unlock the 5-year forecast and compare Cassidy against up to 5 other names.
Uniqueness: will there be another Cassidy in class?
On our rarity read — which blends how common Cassidy is today with its five-year momentum — the name reads as "rare". A high score means genuine rarity — your Cassidy will likely be the only one in the room, with the occasional spelling-out as the price.
Where Cassidy is most common
Geography matters for names, and Cassidy is no exception. Adjusted for how many girls are born in each state, Cassidy is most common in CO (0.8 per 1,000), PA (0.8 per 1,000), NJ (0.6 per 1,000), MI (0.6 per 1,000), LA (0.6 per 1,000) — against a national average of about 0.4 per 1,000 girls. These are per-capita rates, so they show where Cassidy is a genuine regional favorite rather than just where the most babies are born.
Names like Cassidy
Statistically, parents drawn to Cassidy tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Kassidy, Destiny, Cameron, Sydney, and Alexis.
KassidyDestinyCameronSydneyAlexisMikaylaCheyenneSierra
Rank history (last 25 years)
| Year | Babies named Cassidy | Rank |
|---|---|---|
| 2025 | 558 | #541 |
| 2024 | 646 | #478 |
| 2023 | 620 | #495 |
| 2022 | 661 | #478 |
| 2021 | 655 | #478 |
| 2020 | 765 | #411 |
| 2019 | 865 | #368 |
| 2018 | 869 | #361 |
| 2017 | 1,003 | #326 |
| 2016 | 1,123 | #289 |
| 2015 | 1,236 | #257 |
| 2014 | 1,311 | #247 |
| 2013 | 1,276 | #250 |
| 2012 | 1,140 | #280 |
| 2011 | 1,126 | #282 |
| 2010 | 1,286 | #250 |
| 2009 | 1,360 | #244 |
| 2008 | 1,491 | #228 |
| 2007 | 1,657 | #207 |
| 2006 | 1,771 | #199 |
| 2005 | 1,833 | #189 |
| 2004 | 2,007 | #168 |
| 2003 | 2,235 | #150 |
| 2002 | 2,634 | #131 |
| 2001 | 3,029 | #107 |
Frequently asked questions
Is Cassidy a popular girl name?
Cassidy ranked #541 among girls in 2025 with 558 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #257.
When was the name Cassidy most popular?
Cassidy peaked in 1999, when 3,395 American girls received the name (ranked #99 that year). Since 1999 the name has declined from that high.
How rare is the name Cassidy?
In 2025, roughly 1 in 3,226 newborn American girls was named Cassidy. On our rarity scale (rarity blended with momentum) we classify it as "rare".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.