How Many People Are Named Coi?
An estimated 165 people in the United States have the first name Coi. It is used for both genders, with 60.8% female. The average bearer is 7 years old, and Coi peaked in popularity in 2021 with 31 births that year.
Below you will find a full statistical profile of Coi 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 Coi paired with any surname.
Estimated Living Americans
165
About 1 in 2,077,299 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
60.8% confidence
Average Age
7
years old
Peak Year
2021
31 births
Total Registered
166
since 1880
Gender Distribution for Coi
Coi is a genuinely unisex name, used for both males (39.2%) and females (60.8%). Out of 166 total births registered, 65 were male and 101 were female.
Coi as a male name
Ranked #10,062 in 2024
7 male births in 2024
Peak: 2021 (13 births)
Coi as a female name
Ranked #5,821 in 2024
21 female births in 2024
Peak: 2023 (23 births)
Coi: Popularity Over Time
SSA records for Coi span from the 1990s to the 2020s, covering 4 decades of naming data. The most popular decade for this name was the 2020s, when 122 babies were registered. Coi remains highly popular today, with recent registration numbers near its historical peak.
Coi by Decade
How has Coi 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.
Coi + Last Name Combinations
How many people share a full name with Coi as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Coi
Other first names starting with C with a similar number of bearers.
Coi: Questions and Answers
How many people in the U.S. are named Coi?
We estimate approximately 165 people named Coi 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 2,077,299 Americans share this first name.
Is Coi a common name?
Coi is classified as "Very Rare" and is more popular than 71.6% of all first names in the SSA database. A total of 166 births have been registered with this name since 1880.
When was Coi most popular?
Coi reached peak popularity in 2021, when 31 babies were given this name. The average age of a living person named Coi is approximately 7 years old, reflecting when the name was most commonly given.
Is Coi a female name?
Coi is predominantly female. 60.8% of people with this name are female. See the gender breakdown above for full details.
How many Coi Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Coi Smith, Coi Johnson, Coi 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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