How Many People Are Named Cosmo?
An estimated 1,771 people in the United States have the first name Cosmo. It is almost exclusively a male name. The average bearer is 32 years old, and Cosmo peaked in popularity in 2022 with 105 births that year.
Below you will find a full statistical profile of Cosmo as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Cosmo paired with any surname.
Estimated Living Americans
1,771
About 1 in 193,537 people in the U.S.
Rarity
Rare
Predicted Gender
Male
99.8% confidence
Average Age
32
years old
Peak Year
2022
105 births
Total Registered
2,875
since 1880
Gender Distribution for Cosmo
Cosmo is almost exclusively a male name. Out of 2,875 total births registered, 99.8% were male.
Cosmo as a male name
Ranked #1,683 in 2024
99 male births in 2024
Peak: 2022 (99 births)
Cosmo as a female name
Ranked #13,973 in 2022
6 female births in 2022
Peak: 2022 (6 births)
Cosmo: Popularity Over Time
SSA records for Cosmo span from the 1910s to the 2020s, covering 12 decades of naming data. The most popular decade for this name was the 1920s, when 452 babies were registered. Cosmo remains highly popular today, with recent registration numbers near its historical peak.
Cosmo by Decade
How has Cosmo tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Cosmo by State
Birth registrations for Cosmo span all 14 states and territories in the SSA database. The highest counts are in New York, California, Massachusetts. The lowest are in Tennessee, Rhode Island, Oklahoma. On average, about 85 Cosmos were registered per state.
Cosmo + Last Name Combinations
How many people share a full name with Cosmo as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Cosmo
Other first names starting with C with a similar number of bearers.
Cosmo: Questions and Answers
How many people in the U.S. are named Cosmo?
We estimate approximately 1,771 people named Cosmo are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 193,537 Americans share this first name.
Is Cosmo a common name?
Cosmo is classified as "Rare" and is more popular than 93.2% of all first names in the SSA database. A total of 2,875 births have been registered with this name since 1880.
When was Cosmo most popular?
Cosmo reached peak popularity in 2022, when 105 babies were given this name. The average age of a living person named Cosmo is approximately 32 years old, reflecting when the name was most commonly given.
Is Cosmo a male name?
Cosmo is predominantly male. 99.8% of people with this name are male. See the gender breakdown above for full details.
How many Cosmo Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Cosmo Smith, Cosmo Johnson, Cosmo Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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