Feminine dossier · first seen 1956
Siobhan
Resurgent
Gaining cultural share
Peak era
1980
Peak births
282
Current vitality
Rare
Peak generation
Gen X
Quick answers about Siobhan
How many people are named Siobhan?
An estimated 6,908 living Americans are named Siobhan.
How rare is Siobhan?
Siobhan is uncommon among babies today, with 90 girls receiving the name in 2025, down 68.1% from its 1980 peak.
How old is the typical Siobhan?
The median age of a living American named Siobhan is approximately 39 years, with most bearers falling between 26 and 47 years old.
Is Siobhan still popular?
Yes — Siobhan is currently rising in popularity, with 90 births in 2025. Births this decade are running about 1.2× higher than the previous decade.
Where is Siobhan most common?
Siobhan has its strongest geographic signal in Massachusetts, where it appears 8.6× more often than the national baseline.
1956Peak 19802025
Peak year
1980
Decline from peak
68.1%
2025
90
All-time
7,399