How Many People Are Named Cosimo?
An estimated 515 people in the United States have the first name Cosimo. It is almost exclusively a male name. The average bearer is 40 years old, and Cosimo peaked in popularity in 1927 with 30 births that year.
Below you will find a full statistical profile of Cosimo 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 Cosimo paired with any surname.
Estimated Living Americans
515
About 1 in 665,542 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
40
years old
Peak Year
1927
30 births
Total Registered
1,000
since 1880
Gender Distribution for Cosimo
Cosimo is almost exclusively a male name. Out of 1,000 total births registered, 100.0% were male.
Cosimo as a male name
Ranked #5,081 in 2024
19 male births in 2024
Peak: 1927 (30 births)
Cosimo: Popularity Over Time
SSA records for Cosimo span from the 1910s to the 2020s, covering 12 decades of naming data. The most popular decade for this name was the 1920s, when 218 babies were registered. While Cosimo is less common than at its peak in the 1920s, it remains a well-established name with steady registrations.
Cosimo by Decade
How has Cosimo 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.
Cosimo by State
Birth registrations for Cosimo span all 4 states and territories in the SSA database. The highest counts are in New York, Pennsylvania, New Jersey. The lowest are in California, New Jersey, Pennsylvania. On average, about 65 Cosimos were registered per state.
Cosimo + Last Name Combinations
How many people share a full name with Cosimo as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Cosimo
Other first names starting with C with a similar number of bearers.
Cosimo: Questions and Answers
How many people in the U.S. are named Cosimo?
We estimate approximately 515 people named Cosimo 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 665,542 Americans share this first name.
Is Cosimo a common name?
Cosimo is classified as "Very Rare" and is more popular than 84.8% of all first names in the SSA database. A total of 1,000 births have been registered with this name since 1880.
When was Cosimo most popular?
Cosimo reached peak popularity in 1927, when 30 babies were given this name. The average age of a living person named Cosimo is approximately 40 years old, reflecting when the name was most commonly given.
Is Cosimo a male name?
Cosimo is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Cosimo Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Cosimo Smith, Cosimo Johnson, Cosimo 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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