How Many People Are Named Cosima?
An estimated 317 people in the United States have the first name Cosima. It is almost exclusively a female name. The average bearer is 11 years old, and Cosima peaked in popularity in 2017 with 36 births that year.
Below you will find a full statistical profile of Cosima 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 Cosima paired with any surname.
Estimated Living Americans
317
About 1 in 1,081,244 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
11
years old
Peak Year
2017
36 births
Total Registered
320
since 1880
Gender Distribution for Cosima
Cosima is almost exclusively a female name. Out of 320 total births registered, 100.0% were female.
Cosima as a female name
Ranked #6,975 in 2024
16 female births in 2024
Peak: 2017 (36 births)
Cosima: Popularity Over Time
SSA records for Cosima span from the 1980s to the 2020s, covering 5 decades of naming data. The most popular decade for this name was the 2010s, when 205 babies were registered. While Cosima is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Cosima by Decade
How has Cosima 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.
Cosima by State
Birth registrations for Cosima span all 4 states and territories in the SSA database. The highest counts are in New York, California, Texas. The lowest are in Washington, Texas, California. On average, about 11 Cosimas were registered per state.
Cosima + Last Name Combinations
How many people share a full name with Cosima as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Cosima
Other first names starting with C with a similar number of bearers.
Cosima: Questions and Answers
How many people in the U.S. are named Cosima?
We estimate approximately 317 people named Cosima 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 1,081,244 Americans share this first name.
Is Cosima a common name?
Cosima is classified as "Very Rare" and is more popular than 79.8% of all first names in the SSA database. A total of 320 births have been registered with this name since 1880.
When was Cosima most popular?
Cosima reached peak popularity in 2017, when 36 babies were given this name. The average age of a living person named Cosima is approximately 11 years old, reflecting when the name was most commonly given.
Is Cosima a female name?
Cosima is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Cosima Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Cosima Smith, Cosima Johnson, Cosima 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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