Cosimo Boy
How popular is Cosimo?
#5,606 boy name in 2025
16 baby boys were named Cosimo in the US in 2025, making it the 5606th most popular boy name.
512living people named Cosimo (est.)
34median age of people named Cosimo
1,016babies named Cosimo since 1880
1 in 207,209US babies born in 2025
Cosimo popularity over time
| Rank in 2025 | #5,606 for boys (▼ 543 from 2024) |
|---|---|
| Babies in 2025 | 16 boys |
| 10-year trend | Rising fast (+78% babies vs 2015) |
| Earlier ranks | #8,035 in 2015, #7,497 in 2020 |
| Peak year | 1927 (30 boys) |
| Highest rank | #1,350 in 1927 |
| First recorded | 1911 |
| Boys vs girls (last 10 years) | 100% boys, 0% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Where Cosimo is most popular
Babies named Cosimo per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
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- New York: 0.0 per 1,000 (10 boys)
- California: 0.0 per 1,000 (5 boys)
Cosimo by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1910s | 123 | #1,528 |
| 1920s | 218 | #1,350 |
| 1930s | 91 | #1,559 |
| 1940s | 92 | #1,987 |
| 1950s | 70 | #2,579 |
| 1960s | 62 | #2,464 |
| 1970s | 40 | #3,519 |
| 1980s | 50 | #3,097 |
| 1990s | 37 | #6,221 |
| 2000s | 68 | #6,798 |
| 2010s | 80 | #5,784 |
| 2020s | 85 | #5,063 |
Boy names about as popular as Cosimo
Questions
- Is Cosimo a boy or girl name?
- Cosimo is mostly a boy name. Over the last 10 years, 100% of babies named Cosimo were boys.
- How popular is the name Cosimo?
- 16 baby boys were named Cosimo in the US in 2025, making it the 5606th most popular boy name.
- When was Cosimo most popular?
- Cosimo peaked in 1927, when 30 boys were given the name. Its highest rank was #1,350 in 1927.
- How many people are named Cosimo?
- 1,016 babies have been named Cosimo in the US since 1880. We estimate about 512 of them are alive in 2026, with a median age of 34.
- Where is Cosimo most popular?
- From 2021 to 2025, Cosimo was most common in New York, at 0.0 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.