How Many People Are Named Kotaro?
An estimated 187 people in the United States have the first name Kotaro. It is almost exclusively a male name. The average bearer is 18 years old, and Kotaro peaked in popularity in 2010 with 15 births that year.
Below you will find a full statistical profile of Kotaro 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 Kotaro paired with any surname.
Estimated Living Americans
187
About 1 in 1,832,911 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
18
years old
Peak Year
2010
15 births
Total Registered
194
since 1880
Gender Distribution for Kotaro
Kotaro is almost exclusively a male name. Out of 194 total births registered, 100.0% were male.
Kotaro as a male name
Ranked #10,307 in 2023
7 male births in 2023
Peak: 2010 (15 births)
Kotaro: Popularity Over Time
SSA records for Kotaro span from the 1910s to the 2020s, covering 5 decades of naming data. The most popular decade for this name was the 2000s, when 73 babies were registered. Kotaro has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Kotaro by Decade
How has Kotaro 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.
Kotaro by State
Kotaro + Last Name Combinations
How many people share a full name with Kotaro as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Kotaro
Other first names starting with K with a similar number of bearers.
Kotaro: Questions and Answers
How many people in the U.S. are named Kotaro?
We estimate approximately 187 people named Kotaro 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 1,832,911 Americans share this first name.
Is Kotaro a common name?
Kotaro is classified as "Very Rare" and is more popular than 73.3% of all first names in the SSA database. A total of 194 births have been registered with this name since 1880.
When was Kotaro most popular?
Kotaro reached peak popularity in 2010, when 15 babies were given this name. The average age of a living person named Kotaro is approximately 18 years old, reflecting when the name was most commonly given.
Is Kotaro a male name?
Kotaro is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Kotaro Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Kotaro Smith, Kotaro Johnson, Kotaro 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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