Girl name
Cassidy
As of 2025, Cassidy ranks #541 among American girls' names, according to Social Security records. 558 girls received the name that year. Popularity is fading: #411 five years ago, #541 now. SSA records for Cassidy go back to 1969; the peak came in 1999 at #99, with 3,395 babies named that year. Geographically, it's strongest in Pennsylvania, where it ranks #294 among girl names.
Rankings
2025 rank
#541
among girl names
Trend
Falling
last 5 years
All-time peak
#99
in 1999 (1990s)
Babies in 2025
558
girls named Cassidy
Cassidy popularity, 1880–2025
Where Cassidy is most popular
Share of girls born in 2025:lowhighno data (< 5 births)
Strongest states: Colorado (#317), Pennsylvania (#294), Nevada (#433)
Uniqueness score
41/ 100Balanced
everywhereone of a kind
Well known, but far from crowded — the middle of the field. Based on how many babies per birth were named Cassidy in the most recent year of SSA data.