How Many People Are Named Clo?
An estimated 12 people in the United States have the first name Clo. It is almost exclusively a female name. The average bearer is 89 years old, and Clo peaked in popularity in 1937 with 9 births that year.
Below you will find a full statistical profile of Clo 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 Clo paired with any surname.
Key Insights
- With an average bearer age of 89, Clo is a vintage name most associated with earlier generations. Most living bearers were born before 1947.
- Clo is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
12
About 1 in 28,562,862 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
89
years old
Peak Year
1937
9 births
Total Registered
59
since 1880
Gender Distribution for Clo
Clo is almost exclusively a female name. Out of 59 total births registered, 100.0% were female.
Clo as a female name
Ranked #4,275 in 1943
6 female births in 1943
Peak: 1937 (9 births)
Clo: Popularity Over Time
SSA records for Clo span from the 1910s to the 1940s, covering 3 decades of naming data. The most popular decade for this name was the 1930s, when 33 babies were registered. While Clo is less common than at its peak in the 1930s, it remains a well-established name with steady registrations.
Clo by Decade
How has Clo 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.
Clo by State
Clo + Last Name Combinations
How many people share a full name with Clo as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Clo
Other first names starting with C with a similar number of bearers.
Clo: Questions and Answers
How many people in the U.S. are named Clo?
We estimate approximately 12 people named Clo 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 28,562,862 Americans share this first name.
Is Clo a common name?
Clo is classified as "Very Rare" and is more popular than 32.3% of all first names in the SSA database. A total of 59 births have been registered with this name since 1880.
When was Clo most popular?
Clo reached peak popularity in 1937, when 9 babies were given this name. The average age of a living person named Clo is approximately 89 years old, reflecting when the name was most commonly given.
Is Clo a female name?
Clo is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Clo Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Clo Smith, Clo Johnson, Clo 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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