How Many People Are Named Kostas?
An estimated 347 people in the United States have the first name Kostas. It is almost exclusively a male name. The average bearer is 36 years old, and Kostas peaked in popularity in 1974 with 17 births that year.
Below you will find a full statistical profile of Kostas 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 Kostas paired with any surname.
Estimated Living Americans
347
About 1 in 987,765 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
36
years old
Peak Year
1974
17 births
Total Registered
365
since 1880
Gender Distribution for Kostas
Kostas is almost exclusively a male name. Out of 365 total births registered, 100.0% were male.
Kostas as a male name
Ranked #8,016 in 2023
10 male births in 2023
Peak: 1974 (17 births)
Kostas: Popularity Over Time
SSA records for Kostas span from the 1960s to the 2020s, covering 7 decades of naming data. The most popular decade for this name was the 1970s, when 107 babies were registered. Kostas has declined significantly from its peak in the 1970s. Recent registrations are a fraction of what they were at the name's height.
Kostas by Decade
How has Kostas 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.
Kostas by State
Kostas + Last Name Combinations
How many people share a full name with Kostas as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Kostas
Other first names starting with K with a similar number of bearers.
Kostas: Questions and Answers
How many people in the U.S. are named Kostas?
We estimate approximately 347 people named Kostas 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 987,765 Americans share this first name.
Is Kostas a common name?
Kostas is classified as "Very Rare" and is more popular than 80.8% of all first names in the SSA database. A total of 365 births have been registered with this name since 1880.
When was Kostas most popular?
Kostas reached peak popularity in 1974, when 17 babies were given this name. The average age of a living person named Kostas is approximately 36 years old, reflecting when the name was most commonly given.
Is Kostas a male name?
Kostas is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Kostas Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Kostas Smith, Kostas Johnson, Kostas 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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