Feminine dossier · first seen 1942
Cydney
Endangered
Down 96% from peak
Peak era
1998
Peak births
227
Current vitality
Rare
Peak generation
Gen Z
Quick answers about Cydney
How many people are named Cydney?
An estimated 4,817 living Americans are named Cydney.
How rare is Cydney?
Cydney is very rare among babies today, with 9 girls receiving the name in 2025, down 96% from its 1998 peak.
How old is the typical Cydney?
The median age of a living American named Cydney is approximately 28 years, with most bearers falling between 22 and 35 years old.
Is Cydney still popular?
No. Cydney is endangered as a baby name, down 96% from its 1998 peak with 9 births in 2025.
Where is Cydney most common?
Cydney has its strongest geographic signal in California, where it appears 2.5× more often than the national baseline.
1942Peak 19982025
Peak year
1998
Decline from peak
96%
2025
9
All-time
5,145
Where it lives now
Cydney is most concentrated in Georgia — about 2.2× the national rate in the 2000s.
States where Cydney is given more often than the national average — its present-day heartland.