An estimated 59,694 living Americans are named Cassidy.
How rare is Cassidy?
Cassidy is moderately uncommon among babies today, with 558 girls receiving the name in 2025, down 83.6% from its 1999 peak.
How old is the typical Cassidy?
The median age of a living American named Cassidy is approximately 25 years, with most bearers falling between 16 and 29 years old.
Is Cassidy still popular?
Not especially. Cassidy has been declining since its 1999 peak and registered 558 births in 2025.
Where is Cassidy most common?
Cassidy has its strongest geographic signal in Utah, where it appears 5.3× more often than the national baseline.
1969Peak 19992025
Peak year
1999
Decline from peak
83.6%
2025
558
All-time
60,848
Diaspora map
Cassidy broke out in Alabama, Arkansas, Connecticut, Idaho, Maine, Nebraska, Nevada, New Mexico, Oklahoma, Oregon, South Carolina, Tennessee, Utah, and Washington (1992) and became over-represented in 41 states over 28 years.
Broke out: Alabama, Arkansas, Connecticut, Idaho, Maine, Nebraska, Nevada, New Mexico, Oklahoma, Oregon, South Carolina, Tennessee, Utah, and Washington, 1992 · over-represented in 41 states over 28 years
