How old is someone named Cassius?
The average Cassius is 14 years old.
Half of all living Cassiuses are between 5 and 16.
When was Cassius popular?
Cassius was popular around 1880, faded for decades, and is back: 504 babies got the name in 2025.
Popular names of 2021 · The most popular names of the 2020s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 5 | 0 |
| 1910s | 95 | 0 |
| 1920s | 112 | 0 |
| 1930s | 47 | 0 |
| 1940s | 59 | under 100 |
| 1950s | 34 | under 100 |
| 1960s | 309 | 250 |
| 1970s | 189 | 170 |
| 1980s | 211 | 200 |
| 1990s | 419 | 410 |
| 2000s | 1,225 | 1,200 |
| 2010s | 3,643 | 3,600 |
| 2020s | 3,301 | 3,300 |
How many Cassiuses are still alive?
About 9,200 Cassiuses are alive in the US today. That's 94% of the roughly 9,800 babies named Cassius since 1880.
Nearly every Cassius ever born is still alive, because almost all of them are young.
What generation is the name Cassius?
About two in three living Cassiuses are in Gen Alpha, born in 2013 or later.
- Boomer 2%
- Gen X 4%
- Millennial 5%
- Gen Z 22%
- Gen Alpha 68%
Is Cassius an old name?
No. Cassius is one of the youngest names around: younger than 87 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Cassius will be 25 in 2056, so the name is aging slowly.
Is Cassius a boy or girl name?
Almost entirely boys: 99.7% of living Cassiuses are men.
Names the same age as Cassius
NAME TWIN
Cassius's name twin is Zara. Of all 3,713 names on AgeByName, Zara's age curve is the closest match to Cassius's: 92% alike.
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Questions about the name Cassius
How old is the average Cassius?
The average Cassius in the US is 14 years old. The median is 9, so half are older and half younger.
How many people are named Cassius?
About 9,200 Cassiuses are alive in the US today, out of roughly 9,800 babies given the name since 1880.
When was the name Cassius most popular?
In 2021, when about 610 baby boys were named Cassius.
Is Cassius a Gen Alpha name?
Yes. About 68% of living Cassiuses are in Gen Alpha, born in 2013 or later.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). Updated each spring. How we calculate this