Masculine dossier · first seen 1880
Cassius
Stable
Cross-generational persistence
Peak era
2021
Peak births
607
Current vitality
Fragile
Peak generation
Gen Alpha
Quick answers about Cassius
How many people are named Cassius?
An estimated 9,139 living Americans are named Cassius.
How rare is Cassius?
Cassius is moderately uncommon among babies today, with 504 boys receiving the name in 2025, down 17% from its 2021 peak.
How old is the typical Cassius?
The median age of a living American named Cassius is approximately 9 years, with most bearers falling between 5 and 16 years old.
Is Cassius still popular?
Yes. Cassius is holding steady, with 504 births in 2025 and a consistent recent baseline.
Where is Cassius most common?
Cassius has its strongest geographic signal in Washington, where it appears 2.7× more often than the national baseline.
1880Peak 20212025
Peak year
2021
Decline from peak
17%
2025
504
All-time
9,736
Where it lives now
Cassius is most concentrated in Washington — about 2.3× the national rate in the 2020s. It also runs high in Colorado.
States where Cassius is given more often than the national average — its present-day heartland.