Feminine dossier · first seen 1945
Sydnee
Endangered
Down 97.2% from peak
Peak era
2003
Peak births
506
Current vitality
Rare
Peak generation
Gen Z
Quick answers about Sydnee
How many people are named Sydnee?
An estimated 8,072 living Americans are named Sydnee.
How rare is Sydnee?
Sydnee is very rare among babies today, with 14 girls receiving the name in 2025, down 97.2% from its 2003 peak.
How old is the typical Sydnee?
The median age of a living American named Sydnee is approximately 24 years, with most bearers falling between 18 and 28 years old.
Is Sydnee still popular?
No. Sydnee is endangered as a baby name, down 97.2% from its 2003 peak with 14 births in 2025.
Where is Sydnee most common?
Sydnee has its strongest geographic signal in Utah, where it appears 8.4× more often than the national baseline.
1945Peak 20032025
Peak year
2003
Decline from peak
97.2%
2025
14
All-time
8,255
Where it lives now
Sydnee is most concentrated in Utah — about 7.0× the national rate in the 2000s. It also runs high in Idaho.
States where Sydnee is given more often than the national average — its present-day heartland.