Masculine dossier · first seen 1881
Alfonso
Stable
Cross-generational persistence
Peak era
1991
Peak births
574
Current vitality
Fragile
Peak generation
Millennial
Quick answers about Alfonso
How many people are named Alfonso?
An estimated 28,251 living Americans are named Alfonso.
How rare is Alfonso?
Alfonso is uncommon among babies today, with 223 boys receiving the name in 2025, down 61.1% from its 1991 peak.
How old is the typical Alfonso?
The median age of a living American named Alfonso is approximately 38 years, with most bearers falling between 23 and 55 years old.
Is Alfonso still popular?
Yes. Alfonso is holding steady, with 223 births in 2025 and a consistent recent baseline.
Where is Alfonso most common?
Alfonso has its strongest geographic signal in New Mexico, where it appears 20.3× more often than the national baseline.
1881Peak 19912025
Peak year
1991
Decline from peak
61.1%
2025
223
All-time
41,464
Where it lives now
Alfonso is most concentrated in New Mexico — about 20.3× the national rate in the 1930s.
States where Alfonso is given more often than the national average — its present-day heartland.