Masculine dossier · first seen 1880
Rex
Stable
Cross-generational persistence
Peak era
1951
Peak births
1,503
Current vitality
Fragile
Peak generation
Boomer
Quick answers about Rex
How many people are named Rex?
An estimated 33,050 living Americans are named Rex.
How rare is Rex?
Rex is uncommon among babies today, with 281 boys receiving the name in 2025, down 81.3% from its 1951 peak.
How old is the typical Rex?
The median age of a living American named Rex is approximately 60 years, with most bearers falling between 28 and 70 years old.
Is Rex still popular?
Yes. Rex is holding steady, with 281 births in 2025 and a consistent recent baseline.
Where is Rex most common?
Rex has its strongest geographic signal in Utah, where it appears 9.9× more often than the national baseline.
1880Peak 19512025
Peak year
1951
Decline from peak
81.3%
2025
281
All-time
60,449