boy's name
Cosmo
- Gender Boy
- Syllables 2
- Letters 5
- Popularity Uncommon
- Births on record 3,882
England and Wales
#646
2025 births
Cosmo is a boy's name with 2 syllables. In 2025 it was given to 80 babies in the United States. It is used consistently but remains uncommon.
- Peaked in 2022, when 105 babies were given the name.
- It has been rising over the past decade.
- Today about 1 in 41,442 babies in the United States is given this name.
- First appears in US birth records in 1910.
- 2 syllables, with the stress on syllable 1.
Cosmo over time
Births per decade in the United States, 1910s to 2020s. The striped bar is the 2020s, still in progress — it covers 2020 to 2025, not a full ten years.
Show the numbers
| Decade | Births |
|---|---|
| 1910s | 254 |
| 1920s | 452 |
| 1930s | 286 |
| 1940s | 191 |
| 1950s | 191 |
| 1960s | 121 |
| 1970s | 128 |
| 1980s | 108 |
| 1990s | 172 |
| 2000s | 254 |
| 2010s | 282 |
| 2020s (to 2025) | 516 |
How popular is Cosmo?
In 2025, Cosmo was given to 80 babies in the United States. It is used consistently but remains uncommon.
Where Cosmo is used
US figures omit any name given to fewer than five babies in a year, so the rarest names are absent from the source rather than absent from use. Data & sources.
Names that peaked alongside Cosmo
These names rose and fell in the same era, which is why they tend to sound like they belong together.
Parents who like Cosmo also like
Names whose popularity has risen and fallen in step with Cosmo over the last century — the same taste, a different name.
Sibling names for Cosmo
Names from the same era that won't rhyme or share an initial with Cosmo — the two things that make a sibling set grate.
Common questions about Cosmo
How popular is the name Cosmo?
In 2025, Cosmo was given to 80 babies in the United States. It is used consistently but remains uncommon.
Is Cosmo a girl's or a boy's name?
Cosmo is given almost entirely to boys in birth records.
How many syllables are in Cosmo?
Cosmo has 2 syllables.
When was Cosmo most popular?
Cosmo peaked in 2022, when 105 babies were given the name. It has been rising over the past decade.
Is Cosmo a good name?
That is not something records can settle, but they can tell you what you would be choosing. Cosmo currently ranks #646 in the United States. It has been rising over the past decade. Everything else — how it sounds with your surname, who it reminds you of — is yours.