How Many People Are Named Sydnei?
people named Sydnei are alive in the United States today (estimate)
About 1 in 545,111 people in the US has this name
Based on 635 babies named Sydnei in Social Security records from 1988 to 2020, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Peak Year
37 births
Trend
Stable (last 10 years)
⚧ Gender Distribution
All of the babies given the name Sydnei in the records were girls.
👥 Age Distribution
The average person named Sydnei alive today is about 22 years old, and 84% are under 30. Half of them were between 16 and 28 in 2025.
📈 Popularity Over Time
Sydnei first appears in the records in 1988 and was given most often in 2005, to 37 babies. The last year it was given to at least 5 babies of one sex was 2020.
Babies given the name each year, 1988 to 2020
🏆 Rank History
Sydnei has never been one of the 100 most popular girls' names. Its best rank was #3,417, in 1996.
| Girls | |
|---|---|
| Rank in 2025 | Not ranked |
| Best rank | #3,417 (1996) |
| Years in the top 100 | None |
| Rank in its biggest decade | #4,851 in the 2000s |
📍 State-Wise Distribution
People named Sydnei alive today, by the state where they were born (estimate; state records start in 1910).
More people named Sydnei were born in Texas than in any other state: about 21 of those alive today.
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