Masculine dossier · first seen 1880
Isadore
Endangered
Down 94.5% from peak
Peak era
1916
Peak births
273
Current vitality
Rare
Peak generation
Greatest Generation
Quick answers about Isadore
How many people are named Isadore?
An estimated 982 living Americans are named Isadore.
How rare is Isadore?
Isadore is very rare among babies today, with 15 boys receiving the name in 2025, down 94.5% from its 1916 peak.
How old is the typical Isadore?
The median age of a living American named Isadore is approximately 52 years, with most bearers falling between 24 and 69 years old.
Is Isadore still popular?
No. Isadore is endangered as a baby name, down 94.5% from its 1916 peak with 15 births in 2025.
Where is Isadore most common?
Isadore has its strongest geographic signal in Pennsylvania, where it appears 2.4× more often than the national baseline.
1880Peak 19162025
Peak year
1916
Decline from peak
94.5%
2025
15
All-time
5,714
Where it lives now
Isadore is most concentrated in Pennsylvania — about 2.4× the national rate in the 1920s.
States where Isadore is given more often than the national average — its present-day heartland.