How old is someone named Demetrius?
The average Demetrius is 35 years old.
Half of all living Demetriuses are between 23 and 47.
When was Demetrius popular?
Demetrius peaked in 1991 and has been given less and less ever since. Only 164 babies got the name in 2025.
Popular names of 1991 · The most popular names of the 1990s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1910s | 36 | 0 |
| 1920s | 42 | 0 |
| 1930s | 19 | 0 |
| 1940s | 86 | under 100 |
| 1950s | 587 | 410 |
| 1960s | 2,915 | 2,400 |
| 1970s | 6,950 | 6,300 |
| 1980s | 7,631 | 7,200 |
| 1990s | 8,552 | 8,300 |
| 2000s | 5,777 | 5,700 |
| 2010s | 3,777 | 3,700 |
| 2020s | 1,419 | 1,400 |
How many Demetriuses are still alive?
About 35,000 Demetriuses are alive in the US today. That's 94% of the roughly 38,000 babies named Demetrius since 1912.
Nearly every Demetrius ever born is still alive, because almost all of them are young.
What generation is the name Demetrius?
About one in three living Demetriuses are Millennials, born between 1981 and 1996.
- Boomer 3%
- Gen X 25%
- Millennial 36%
- Gen Z 25%
- Gen Alpha 11%
Is Demetrius an old name?
Somewhat. Demetrius is older than 59 in 100 names on AgeByName, but younger than plenty of classics.
Looking ahead: if babies keep getting the name at today's pace, the typical Demetrius will be 53 in 2056, so the name is getting older.
Is Demetrius a boy or girl name?
Mostly boys: 95.5% of living Demetriuses are men.
Names the same age as Demetrius
NAME TWIN
Demetrius's name twin is Aaron. Of all 3,713 names on AgeByName, Aaron's age curve is the closest match to Demetrius's: 93% alike.
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Questions about the name Demetrius
How old is the average Demetrius?
The average Demetrius in the US is 35 years old. The median is 35, so half are older and half younger.
How many people are named Demetrius?
About 35,000 Demetriuses are alive in the US today, out of roughly 38,000 babies given the name since 1912.
When was the name Demetrius most popular?
In 1991, when about 1,100 baby boys were named Demetrius.
Is Demetrius a Millennial name?
Partly. Millennials are the largest group, about 36% of living Demetriuses, but the name spans several generations.
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