An estimated 14,002 living Americans are named Kailyn.
How rare is Kailyn?
Kailyn is uncommon among babies today, with 110 girls receiving the name in 2025, down 86.1% from its 2011 peak.
How old is the typical Kailyn?
The median age of a living American named Kailyn is approximately 18 years, with most bearers falling between 13 and 25 years old.
Is Kailyn still popular?
Not especially. Kailyn has been declining since its 2011 peak and registered 110 births in 2025.
Where is Kailyn most common?
Kailyn has its strongest geographic signal in Mississippi, where it appears 3.4× more often than the national baseline.
1981Peak 20112025
Peak year
2011
Decline from peak
86.1%
2025
110
All-time
14,211
Diaspora map
Kailyn spread fast — broke out in Louisiana, Mississippi, Montana, Nebraska, New Hampshire, Oklahoma, South Carolina, and West Virginia (2008) and ran high in 19 states within a decade.
Broke out: Louisiana, Mississippi, Montana, Nebraska, New Hampshire, Oklahoma, South Carolina, and West Virginia, 2008 · over-represented in 19 states over 3 years
