Cosmo Boy
How popular is Cosmo?
#1,932 boy name in 2025
80 baby boys were named Cosmo in the US in 2025, making it the 1932nd most popular boy name.
Cosmo popularity over time
Boys Girls
| Rank in 2025 | #1,932 for boys (▼ 247 from 2024) |
|---|---|
| Babies in 2025 | 80 boys |
| 10-year trend | Rising fast (+150% babies vs 2015) |
| Earlier ranks | #3,430 in 2015, #2,263 in 2020 |
| Peak year | 2022 (99 boys) |
| Highest rank | #930 in 1913 |
| First recorded | 1910 |
| Boys vs girls (last 10 years) | 99% boys, 1% girls |
| Chance a classmate shares it | 0.1% in a class of 25 kids born in 2025 |
Cosmo counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Cosmo family of names ranked #1,516 for boys in 2025 (#1,392 the year before), with 92 babies in all.
| Spelling | Boys in 2025 | Share |
|---|---|---|
| Cosmo | 80 | 87% |
| Kosmo | 12 | 13% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Cosmo is most popular
Babies named Cosmo per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
- New York: 0.1 per 1,000 (40 boys)
- California: 0.1 per 1,000 (78 boys)
- Oregon: 0.1 per 1,000 (6 boys)
- Washington: 0.1 per 1,000 (10 boys)
- Oklahoma: 0.1 per 1,000 (5 boys)
Cosmo by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1910s | 254 | #930 |
| 1920s | 452 | #953 |
| 1930s | 286 | #1,116 |
| 1940s | 191 | #1,230 |
| 1950s | 191 | #1,479 |
| 1960s | 121 | #1,972 |
| 1970s | 128 | #1,988 |
| 1980s | 108 | #2,708 |
| 1990s | 172 | #2,680 |
| 2000s | 254 | #2,649 |
| 2010s | 282 | #2,625 |
| 2020s | 510 | #1,685 |
Boy names about as popular as Cosmo
Questions
- Is Cosmo a boy or girl name?
- Cosmo is mostly a boy name. Over the last 10 years, 99% of babies named Cosmo were boys.
- How popular is the name Cosmo?
- 80 baby boys were named Cosmo in the US in 2025, making it the 1932nd most popular boy name.
- When was Cosmo most popular?
- Cosmo peaked in 2022, when 99 boys were given the name. Its highest rank was #930 in 1913.
- How many people are named Cosmo?
- 2,955 babies have been named Cosmo in the US since 1880. We estimate about 1,805 of them are alive in 2026, with a median age of 21.
- Where is Cosmo most popular?
- From 2021 to 2025, Cosmo was most common in New York, at 0.1 of every 1,000 boys born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.