Masculine dossier · first seen 1998
Castor
Stable Decline
Gradual decline from 2016
Peak era
2016
Peak births
29
Current vitality
Rare
Peak generation
Gen Alpha
Quick answers about Castor
How many people are named Castor?
An estimated 386 living Americans are named Castor.
How rare is Castor?
Castor is very rare among babies today, with 21 boys receiving the name in 2025, down 27.6% from its 2016 peak.
How old is the typical Castor?
The median age of a living American named Castor is approximately 10 years, with most bearers falling between 6 and 17 years old.
Is Castor still popular?
Not especially. Castor has been declining since its 2016 peak and registered 21 births in 2025.
1998Peak 20162025
Peak year
2016
Decline from peak
27.6%
2025
21
All-time
390