How Many People Are Named Cosmo?
people named Cosmo are alive in the United States today (estimate)
About 1 in 192,121 people in the US has this name
Based on 2,955 babies named Cosmo in Social Security records from 1910 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Peak Year
105 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
English form of COSMAS. It was introduced to Britain in the 18th century by the second Scottish Duke of Gordon, who named his son and successor after his friend Cosimo III de' Medici.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
⚧ Gender Distribution
Almost all of the babies given the name Cosmo (99.7%) were boys.
👥 Age Distribution
The average person named Cosmo alive today is about 28 years old, and 63% are under 30. Half of them were between 4 and 48 in 2025.
📈 Popularity Over Time
Cosmo first appears in the records in 1910 and was given most often in 2022, to 105 babies. In 2025, 80 babies got the name.
Babies given the name each year, 1910 to 2025
🏆 Rank History
Cosmo has never been one of the 100 most popular boys' names. Its best rank was #933, in 1913. In 2025 it ranked #1,934.
| Boys | |
|---|---|
| Rank in 2025 | #1,934 |
| Best rank | #933 (1913) |
| Years in the top 100 | None |
| Rank in its biggest decade | #1,851 in the 2020s |
📍 State-Wise Distribution
People named Cosmo alive today, by the state where they were born (estimate; state records start in 1910).
More people named Cosmo were born in New York than in any other state: about 226 of those alive today. Compared with the national rate in the same years, Cosmo was given 6.9 times as often in New York, 3 times in Massachusetts and 2.3 times in California.
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