Feminine dossier · first seen 1975
Sinead
Stable
Cross-generational persistence
Peak era
1990
Peak births
160
Current vitality
Rare
Peak generation
Millennial
Quick answers about Sinead
How many people are named Sinead?
An estimated 1,304 living Americans are named Sinead.
How rare is Sinead?
Sinead is very rare among babies today, with 11 girls receiving the name in 2025, down 93.1% from its 1990 peak.
How old is the typical Sinead?
The median age of a living American named Sinead is approximately 31 years, with most bearers falling between 22 and 36 years old.
Is Sinead still popular?
Yes. Sinead is holding steady, with 11 births in 2025 and a consistent recent baseline.
Where is Sinead most common?
Sinead has its strongest geographic signal in Massachusetts, where it appears 4.9× more often than the national baseline.
1975Peak 19902025
Peak year
1990
Decline from peak
93.1%
2025
11
All-time
1,340
Where it lives now
Sinead is most concentrated in New York — about 3.2× the national rate in the 2000s.
States where Sinead is given more often than the national average — its present-day heartland.