How old is someone named Cleo?
The average Cleo is 44 years old.
Half of all living Cleos are between 8 and 76. The average sits between a large older group and a younger one, so many Cleos are much older than 44.
When was Cleo popular?
Cleo peaked in 1920 and has been given less and less ever since. Only 534 babies got the name in 2025.
Popular names of 1920 · The most popular names of the 1920s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 2,878 | 0 |
| 1910s | 9,716 | 0 |
| 1920s | 11,188 | 140 |
| 1930s | 6,059 | 1,100 |
| 1940s | 3,509 | 1,800 |
| 1950s | 2,196 | 1,600 |
| 1960s | 1,030 | 870 |
| 1970s | 662 | 610 |
| 1980s | 544 | 520 |
| 1990s | 641 | 630 |
| 2000s | 704 | 690 |
| 2010s | 1,515 | 1,500 |
| 2020s | 2,721 | 2,700 |
How many Cleos are still alive?
About 12,000 Cleos are alive in the US today. That's 27% of the roughly 45,000 babies named Cleo since 1880.
Most Cleos ever born have died: the name was most popular in 1920, long enough ago that many of those babies are gone.
What generation is the name Cleo?
About one in three living Cleos are in Gen Alpha, born in 2013 or later.
Is Cleo an old name?
Somewhat. Cleo is older than 71 in 100 names on AgeByName, but younger than plenty of classics.
Looking ahead: if babies keep getting the name at today's pace, the typical Cleo will be 25 in 2056, so its average age will actually fall, as the youngest Cleos make up more of the total.
Is Cleo a boy or girl name?
Mostly a girl's name: 78% of living Cleos are women, and 23% are men.
The women average 40 and the men 59.
Names the same age as Cleo
NAME TWIN
Cleo's name twin is Goldie. Of all 3,713 names on AgeByName, Goldie's age curve is the closest match to Cleo's: 90% alike.
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Questions about the name Cleo
How old is the average Cleo?
The average Cleo in the US is 44 years old. The median is 46, so half are older and half younger.
How many people are named Cleo?
About 12,000 Cleos are alive in the US today, out of roughly 45,000 babies given the name since 1880.
When was the name Cleo most popular?
In 1920, when about 1,400 baby girls were named Cleo.
Is Cleo a Gen Alpha name?
Partly. Gen Alpha are the largest group, about 32% of living Cleos, but the name spans several generations.
Is Cleo a boy or girl name?
Mostly a girl's name: 78% of living Cleos are women, and 23% are men. The women average 40 and the men 59.
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