Boy name
Killian
As of 2025, Killian ranks #417 among American boys' names, according to Social Security records. 770 boys received the name that year. Popularity is fading: #352 five years ago, #417 now. SSA records for Killian go back to 1915; the peak came in 2017 at #248, with 1,506 babies named that year. Geographically, it's strongest in Vermont, where it ranks #102 among boy names.
Rankings
2025 rank
#417
among boy names
Trend
Falling
last 5 years
All-time peak
#248
in 2017 (2010s)
Babies in 2025
770
boys named Killian
Killian popularity, 1880–2025
Where Killian is most popular
Share of boys born in 2025:lowhighno data (< 5 births)
Strongest states: Vermont (#102), South Dakota (#221), West Virginia (#254)
Uniqueness score
38/ 100Very common
everywhereone of a kind
A familiar pick that most people will recognize instantly. Based on how many babies per birth were named Killian in the most recent year of SSA data.