How Many People Are Named Klein?
An estimated 349 people in the United States have the first name Klein. It is almost exclusively a male name. The average bearer is 16 years old, and Klein peaked in popularity in 2013 with 25 births that year.
Below you will find a full statistical profile of Klein 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 Klein paired with any surname.
Estimated Living Americans
349
About 1 in 982,104 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
16
years old
Peak Year
2013
25 births
Total Registered
353
since 1880
Gender Distribution for Klein
Klein is almost exclusively a male name. Out of 353 total births registered, 100.0% were male.
Klein as a male name
Ranked #6,313 in 2024
14 male births in 2024
Peak: 2013 (25 births)
Klein: Popularity Over Time
SSA records for Klein span from the 1980s to the 2020s, covering 5 decades of naming data. The most popular decade for this name was the 2010s, when 145 babies were registered. While Klein is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Klein by Decade
How has Klein 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.
Klein by State
Klein + Last Name Combinations
How many people share a full name with Klein as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Klein
Other first names starting with K with a similar number of bearers.
Klein: Questions and Answers
How many people in the U.S. are named Klein?
We estimate approximately 349 people named Klein 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 982,104 Americans share this first name.
Is Klein a common name?
Klein is classified as "Very Rare" and is more popular than 80.8% of all first names in the SSA database. A total of 353 births have been registered with this name since 1880.
When was Klein most popular?
Klein reached peak popularity in 2013, when 25 babies were given this name. The average age of a living person named Klein is approximately 16 years old, reflecting when the name was most commonly given.
Is Klein a male name?
Klein is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Klein Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Klein Smith, Klein Johnson, Klein 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