How old is someone named Sydni?
The average Sydni is 25 years old.
Half of all living Sydnis are between 21 and 29.
When was Sydni popular?
Sydni rose fast and peaked in 2000, then faded almost as fast. 73% of all Sydnis were born within 15 years of each other.
Popular names of 2000 · The most popular names of the 2000s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1940s | 5 | 0 |
| 1960s | 9 | under 100 |
| 1970s | 18 | under 100 |
| 1980s | 217 | 210 |
| 1990s | 1,946 | 1,900 |
| 2000s | 2,503 | 2,500 |
| 2010s | 575 | 570 |
| 2020s | 88 | under 100 |
How many Sydnis are still alive?
About 5,300 Sydnis are alive in the US today. That's 99% of the roughly 5,400 babies named Sydni since 1947.
Nearly every Sydni ever born is still alive, because almost all of them are young.
What generation is the name Sydni?
About two in three living Sydnis are in Gen Z, born between 1997 and 2012.
- Gen X under 1%
- Millennial 24%
- Gen Z 68%
- Gen Alpha 8%
Is Sydni an old name?
Not really. Sydni is younger than 59 in 100 names on AgeByName.
Is Sydni a boy or girl name?
Almost entirely girls: over 99.9% of living Sydnis are women.
Names the same age as Sydni
NAME TWIN
Sydni's name twin is Destiny. Of all 3,713 names on AgeByName, Destiny's age curve is the closest match to Sydni's: 88% alike.
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Questions about the name Sydni
How old is the average Sydni?
The average Sydni in the US is 25 years old. The median is 25, so half are older and half younger.
How many people are named Sydni?
About 5,300 Sydnis are alive in the US today, out of roughly 5,400 babies given the name since 1947.
When was the name Sydni most popular?
In 2000, when about 470 baby girls were named Sydni.
Is Sydni a Gen Z name?
Yes. About 68% of living Sydnis are in Gen Z, born between 1997 and 2012.
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