How Many People Are Named Seamus?
An estimated 7,507 people in the United States have the first name Seamus. It is almost exclusively a male name. The average bearer is 21 years old, and Seamus peaked in popularity in 2008 with 298 births that year.
Below you will find a full statistical profile of Seamus 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 Seamus paired with any surname.
Estimated Living Americans
7,507
About 1 in 45,658 people in the U.S.
Rarity
Rare
Predicted Gender
Male
100.0% confidence
Average Age
21
years old
Peak Year
2008
298 births
Total Registered
7,656
since 1880
Gender Distribution for Seamus
Seamus is almost exclusively a male name. Out of 7,656 total births registered, 100.0% were male.
Seamus as a male name
Ranked #1,450 in 2024
125 male births in 2024
Peak: 2008 (298 births)
Seamus: Popularity Over Time
SSA records for Seamus span from the 1950s to the 2020s, covering 8 decades of naming data. The most popular decade for this name was the 2000s, when 2,446 babies were registered. Seamus has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Seamus by Decade
How has Seamus 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.
Seamus by State
Birth registrations for Seamus span all 30 states and territories in the SSA database. The highest counts are in New York, Massachusetts, California. The lowest are in Montana, Georgia, District of Columbia. On average, about 175 Seamuss were registered per state.
Seamus + Last Name Combinations
How many people share a full name with Seamus as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Seamus
Other first names starting with S with a similar number of bearers.
Seamus: Questions and Answers
How many people in the U.S. are named Seamus?
We estimate approximately 7,507 people named Seamus 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 45,658 Americans share this first name.
Is Seamus a common name?
Seamus is classified as "Rare" and is more popular than 97.3% of all first names in the SSA database. A total of 7,656 births have been registered with this name since 1880.
When was Seamus most popular?
Seamus reached peak popularity in 2008, when 298 babies were given this name. The average age of a living person named Seamus is approximately 21 years old, reflecting when the name was most commonly given.
Is Seamus a male name?
Seamus is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Seamus Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Seamus Smith, Seamus Johnson, Seamus 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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