How old is someone named Sydnee?
The average Sydnee is 24 years old.
Half of all living Sydnees are between 18 and 28.
When was Sydnee popular?
Sydnee was a boom name: it shot up, peaked in 2003, and dropped away. That's why most Sydnees are close to the same age.
Popular names of 2003 · The most popular names of the 2000s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1940s | 12 | under 100 |
| 1950s | 47 | under 100 |
| 1960s | 35 | under 100 |
| 1970s | 38 | under 100 |
| 1980s | 211 | 210 |
| 1990s | 2,542 | 2,500 |
| 2000s | 3,842 | 3,800 |
| 2010s | 1,374 | 1,400 |
| 2020s | 154 | 150 |
How many Sydnees are still alive?
About 8,100 Sydnees are alive in the US today. That's 98% of the roughly 8,300 babies named Sydnee since 1945.
Nearly every Sydnee ever born is still alive, because almost all of them are young.
What generation is the name Sydnee?
About two in three living Sydnees are in Gen Z, born between 1997 and 2012.
- Boomer under 1%
- Gen X under 1%
- Millennial 19%
- Gen Z 70%
- Gen Alpha 10%
Is Sydnee an old name?
Not really. Sydnee is younger than 62 in 100 names on AgeByName.
Is Sydnee a boy or girl name?
Almost entirely girls: over 99.9% of living Sydnees are women.
Names the same age as Sydnee
NAME TWIN
Sydnee's name twin is Sydney. Of all 3,713 names on AgeByName, Sydney's age curve is the closest match to Sydnee's: 93% alike.
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Questions about the name Sydnee
How old is the average Sydnee?
The average Sydnee in the US is 24 years old. The median is 24, so half are older and half younger.
How many people are named Sydnee?
About 8,100 Sydnees are alive in the US today, out of roughly 8,300 babies given the name since 1945.
When was the name Sydnee most popular?
In 2003, when about 510 baby girls were named Sydnee.
Is Sydnee a Gen Z name?
Yes. About 70% of living Sydnees 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