How Many People Are Named Sebastain?
An estimated 484 people in the United States have the first name Sebastain. It is almost exclusively a male name. The average bearer is 23 years old, and Sebastain peaked in popularity in 2002 with 24 births that year.
Below you will find a full statistical profile of Sebastain 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 Sebastain paired with any surname.
Estimated Living Americans
484
About 1 in 708,170 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
23
years old
Peak Year
2002
24 births
Total Registered
500
since 1880
Gender Distribution for Sebastain
Sebastain is almost exclusively a male name. Out of 500 total births registered, 100.0% were male.
Sebastain as a male name
Ranked #10,701 in 2024
7 male births in 2024
Peak: 2002 (24 births)
Sebastain: Popularity Over Time
SSA records for Sebastain span from the 1910s to the 2020s, covering 8 decades of naming data. The most popular decade for this name was the 2000s, when 176 babies were registered. Sebastain has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Sebastain by Decade
How has Sebastain 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.
Sebastain by State
Sebastain + Last Name Combinations
How many people share a full name with Sebastain as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Sebastain
Other first names starting with S with a similar number of bearers.
Sebastain: Questions and Answers
How many people in the U.S. are named Sebastain?
We estimate approximately 484 people named Sebastain 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 708,170 Americans share this first name.
Is Sebastain a common name?
Sebastain is classified as "Very Rare" and is more popular than 84.3% of all first names in the SSA database. A total of 500 births have been registered with this name since 1880.
When was Sebastain most popular?
Sebastain reached peak popularity in 2002, when 24 babies were given this name. The average age of a living person named Sebastain is approximately 23 years old, reflecting when the name was most commonly given.
Is Sebastain a male name?
Sebastain is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Sebastain Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Sebastain Smith, Sebastain Johnson, Sebastain 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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