How old is someone named Alonso?
The average Alonso is 21 years old.
Half of all living Alonsos are between 10 and 28.
When was Alonso popular?
Most of the Alonsos in the country were born in the last 15 years. The name peaked in 2010 and is still near the top.
Popular names of 2010 · The most popular names of the 2010s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1910s | 31 | 0 |
| 1920s | 66 | 0 |
| 1930s | 72 | under 100 |
| 1940s | 74 | under 100 |
| 1950s | 146 | under 100 |
| 1960s | 236 | 190 |
| 1970s | 457 | 410 |
| 1980s | 836 | 790 |
| 1990s | 1,883 | 1,800 |
| 2000s | 3,225 | 3,200 |
| 2010s | 3,311 | 3,300 |
| 2020s | 1,894 | 1,900 |
How many Alonsos are still alive?
About 12,000 Alonsos are alive in the US today. That's 96% of the roughly 12,000 babies named Alonso since 1915.
Nearly every Alonso ever born is still alive, because almost all of them are young.
What generation is the name Alonso?
About two in five living Alonsos are in Gen Z, born between 1997 and 2012.
- Boomer 2%
- Gen X 5%
- Millennial 17%
- Gen Z 41%
- Gen Alpha 35%
Is Alonso an old name?
Not really. Alonso is younger than 68 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Alonso will be 33 in 2056, so the name is aging slowly.
Is Alonso a boy or girl name?
Almost entirely boys: over 99.9% of living Alonsos are men.
Names the same age as Alonso
NAME TWIN
Alonso's name twin is Emmanuel. Of all 3,713 names on AgeByName, Emmanuel's age curve is the closest match to Alonso's: 94% alike.
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Questions about the name Alonso
How old is the average Alonso?
The average Alonso in the US is 21 years old. The median is 18, so half are older and half younger.
How many people are named Alonso?
About 12,000 Alonsos are alive in the US today, out of roughly 12,000 babies given the name since 1915.
When was the name Alonso most popular?
In 2010, when about 380 baby boys were named Alonso.
Is Alonso a Gen Z name?
Partly. Gen Z are the largest group, about 41% of living Alonsos, but the name spans several generations.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). Updated each spring. How we calculate this