1915Peak 20172025
Quick answers about Killian
How many people are named Killian?
An estimated 16,048 living Americans are named Killian.
How rare is Killian?
Killian is moderately uncommon among babies today, with 770 boys receiving the name in 2025, down 48.9% from its 2017 peak.
How old is the typical Killian?
The median age of a living American named Killian is approximately 9 years, with most bearers falling between 5 and 13 years old.
Is Killian still popular?
Not especially. Killian has been declining since its 2017 peak and registered 770 births in 2025.
Diaspora map
Killian broke out in Arizona, Pennsylvania, Tennessee, and Washington (2014) and became over-represented in 18 states over 10 years.
Broke out: Arizona, Pennsylvania, Tennessee, and Washington, 2014 · over-represented in 18 states over 10 years
Origin
≤5 yrs
≤15 yrs
16+ yrs
No breakout
