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

All-time

1,340

Sinead fell hard after 1990. Within five years it had dropped 77% from its peak — one of the steepest post-peak collapses on record.

Sinead peaked in 1990, when 160 girls were given the name.

In 2025, only 11 girls were given the name.

Down 93.1% from its peak.

In all, the Social Security Administration has recorded about 1,340 Americans named Sinead since 1975.

Rarity score99th percentile rare

Peak generationMillennial

StabilityHighly era-bound

TrajectoryCross-generational persistence

Living profile

1,317

Estimated living Americans with this name.

Median age32

Core range22–36

Playground Density Index 0.0%

Wave type

Steady Decline

A name with a broad middle and a downward recent trajectory.

Geographic heartland

Massachusetts

4.9× higher affinity than the national baseline.

Massachusetts · 1990s 4.9×

New York · 1990s 3.4×

New York · 2000s 3.2×