How old is someone named Siena?
The average Siena is 13 years old.
Half of all living Sienas are between 7 and 19.
When was Siena popular?
Siena has been rising for years and peaked in 2018, so most Sienas are still kids.
Popular names of 2018 · The most popular names of the 2010s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1960s | 5 | 0 |
| 1970s | 5 | under 100 |
| 1980s | 94 | under 100 |
| 1990s | 699 | 690 |
| 2000s | 2,939 | 2,900 |
| 2010s | 4,589 | 4,600 |
| 2020s | 2,739 | 2,700 |
How many Sienas are still alive?
About 11,000 Sienas are alive in the US today. That's over 99% of the roughly 11,000 babies named Siena since 1965.
Nearly every Siena ever born is still alive, because almost all of them are young.
What generation is the name Siena?
About half of living Sienas are in Gen Alpha, born in 2013 or later.
- Millennial 4%
- Gen Z 43%
- Gen Alpha 54%
Is Siena an old name?
No. Siena 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 Siena will be 28 in 2056, so the name is getting older.
Is Siena a boy or girl name?
Almost entirely girls: over 99.9% of living Sienas are women.
Names the same age as Siena
NAME TWIN
Siena's name twin is Boston. Of all 3,713 names on AgeByName, Boston's age curve is the closest match to Siena's: 94% alike.
Other spellings: Sienna (12)
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Questions about the name Siena
How old is the average Siena?
The average Siena in the US is 13 years old. The median is 13, so half are older and half younger.
How many people are named Siena?
About 11,000 Sienas are alive in the US today, out of roughly 11,000 babies given the name since 1965.
When was the name Siena most popular?
In 2018, when about 500 baby girls were named Siena.
Is Siena a Gen Alpha name?
Yes. About 54% of living Sienas 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