How popular is the name Killian in 2025?

Killian ranks #417 among US boy names in 2025, with 770 babies given the name.

When was the name Killian most popular?

Killian peaked in 2017, reaching #248 among US boy names.

Killian will almost certainly be the only one in school.

boy name#417 in 2025

Killian entered the US charts in 1915, peaked at #248 in 2017, ranks #417 today — a name gently stepping back from its peak.

#417

rank today

#248

peak (2017)

770

babies in 2025

falling

a name gently stepping back from its peak

Over the last decade, Killian has been most popular in CA, TX, FL.

About 16,000 people named Killian are estimated to be alive in the US today.

The typical Killian is a kid of about 8 — this name's wave is very recent.

Estimated from official SSA birth records and life tables.

How popular is the name Killian in 2025?: Killian ranks #417 among US boy names in 2025, with 770 babies given the name.
When was the name Killian most popular?: Killian peaked in 2017, reaching #248 among US boy names.
Will my child share the name Killian with classmates?: Killian will almost certainly be the only one in school.

Put them head to head — full stats, history and a verdict.