How old is someone named Leo?
The average Leo is 24 years old.
Half of all living Leos are between 5 and 38. The average sits between a large young group and an older one, so many Leos are much younger than 24.
When was Leo popular?
Leo was popular around 1916, faded for decades, and is back: 8,196 babies got the name in 2025.
Popular names of 2022 · The most popular names of the 2020s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 5,784 | 0 |
| 1910s | 27,050 | 0 |
| 1920s | 37,456 | 200 |
| 1930s | 23,083 | 2,600 |
| 1940s | 17,075 | 7,200 |
| 1950s | 15,618 | 10,000 |
| 1960s | 9,539 | 7,700 |
| 1970s | 5,419 | 4,900 |
| 1980s | 4,583 | 4,300 |
| 1990s | 4,749 | 4,600 |
| 2000s | 12,312 | 12,000 |
| 2010s | 44,827 | 44,000 |
| 2020s | 47,645 | 47,000 |
How many Leos are still alive?
About 150,000 Leos are alive in the US today. That's 56% of the roughly 260,000 babies named Leo since 1880.
Roughly half of all Leos ever born are still living.
What generation is the name Leo?
More than half of living Leos are in Gen Alpha, born in 2013 or later.
Is Leo an old name?
Not really. Leo is younger than 61 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Leo will be 24 in 2056, about the same as today.
Is Leo a boy or girl name?
Almost entirely boys: 99.6% of living Leos are men.
Names the same age as Leo
NAME TWIN
Leo's name twin is Everett. Of all 3,713 names on AgeByName, Everett's age curve is the closest match to Leo's: 94% alike.
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Questions about the name Leo
How old is the average Leo?
The average Leo in the US is 24 years old. The median is 11, so half are older and half younger.
How many people are named Leo?
About 150,000 Leos are alive in the US today, out of roughly 260,000 babies given the name since 1880.
When was the name Leo most popular?
In 2022, when about 8,300 baby boys were named Leo.
Is Leo a Gen Alpha name?
Yes. About 58% of living Leos are in Gen Alpha, born in 2013 or later.
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