How Many People Are Named Kazuo?
An estimated 61 people in the United States have the first name Kazuo. It is almost exclusively a male name. The average bearer is 66 years old, and Kazuo peaked in popularity in 1921 with 57 births that year.
Below you will find a full statistical profile of Kazuo 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 Kazuo paired with any surname.
Key Insights
- With an average bearer age of 66, Kazuo is a vintage name most associated with earlier generations. Most living bearers were born before 1970.
- Kazuo is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
61
About 1 in 5,618,924 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
66
years old
Peak Year
1921
57 births
Total Registered
757
since 1880
Gender Distribution for Kazuo
Kazuo is almost exclusively a male name. Out of 757 total births registered, 100.0% were male.
Kazuo as a male name
Ranked #10,458 in 2009
7 male births in 2009
Peak: 1921 (57 births)
Kazuo: Popularity Over Time
SSA records for Kazuo span from the 1910s to the 2000s, covering 5 decades of naming data. The most popular decade for this name was the 1920s, when 375 babies were registered. Kazuo has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Kazuo by Decade
How has Kazuo 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.
Kazuo by State
Birth registrations for Kazuo span all 3 states and territories in the SSA database. The highest counts are in Hawaii, California, Washington. The lowest are in Washington, California, Hawaii. On average, about 200 Kazuos were registered per state.
Kazuo + Last Name Combinations
How many people share a full name with Kazuo as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Kazuo
Other first names starting with K with a similar number of bearers.
Kazuo: Questions and Answers
How many people in the U.S. are named Kazuo?
We estimate approximately 61 people named Kazuo 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 5,618,924 Americans share this first name.
Is Kazuo a common name?
Kazuo is classified as "Very Rare" and is more popular than 57.3% of all first names in the SSA database. A total of 757 births have been registered with this name since 1880.
When was Kazuo most popular?
Kazuo reached peak popularity in 1921, when 57 babies were given this name. The average age of a living person named Kazuo is approximately 66 years old, reflecting when the name was most commonly given.
Is Kazuo a male name?
Kazuo is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Kazuo Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Kazuo Smith, Kazuo Johnson, Kazuo 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.
Search for a full name combination
How Many of Me