Feminine dossier · first seen 1979
Cailyn
Endangered
Down 90% from peak
Peak era
2009
Peak births
401
Current vitality
Rare
Peak generation
Gen Z
Quick answers about Cailyn
How many people are named Cailyn?
An estimated 5,468 living Americans are named Cailyn.
How rare is Cailyn?
Cailyn is very rare among babies today, with 40 girls receiving the name in 2025, down 90% from its 2009 peak.
How old is the typical Cailyn?
The median age of a living American named Cailyn is approximately 18 years, with most bearers falling between 14 and 24 years old.
Is Cailyn still popular?
No. Cailyn is endangered as a baby name, down 90% from its 2009 peak with 40 births in 2025.
Where is Cailyn most common?
Cailyn has its strongest geographic signal in Alabama, where it appears 2.1× more often than the national baseline.
1979Peak 20092025
Peak year
2009
Decline from peak
90%
2025
40
All-time
5,549
Where it lives now
Cailyn is most concentrated in Georgia — about 1.8× the national rate in the 2010s.
States where Cailyn is given more often than the national average — its present-day heartland.