Seamus
Seamus was the 1280th most popular name for boys in 2025, given to 154 babies. Its best year was 2003, when it ranked 735th; the most babies were born in 2008 (298). Over the last ten years it has moved down 334 places. More babies were named Seamus in the 2000s than in any other decade.
Meaning Not yet researched how we research meanings
- Rank in 2025
- #1,280 boys, down 85 places since 2020
- Babies in 2025
- 154boys
- Girls and boys
- Almost always a boy’s name2021–2025
- Peak year
- 2008298 babies
- Total since 1880
- 7,809babies recorded
Seamus popularity since 1880
| Year | Rank (boys) | Babies (boys) |
|---|---|---|
| 2025 | #1,280 | 154 |
| 2020 | #1,195 | 161 |
| 2010 | #875 | 240 |
| 2000 | #828 | 194 |
| 1990 | #1,285 | 75 |
| 1980 | #1,338 | 50 |
| 1970 | #2,277 | 17 |
| 1960 | #3,042 | 9 |
| 1950 | — | — |
| 1940 | — | — |
| 1930 | — | — |
| 1920 | — | — |
| 1910 | — | — |
| 1900 | — | — |
| 1890 | — | — |
| 1880 | — | — |
How popular is Seamus, counting every spelling?
Seamus is the most common spelling of a name family that ranked #1,169 for boys in 2025 once every spelling is counted together, compared with #1,280 for Seamus on its own. Together these spellings went to 163 boys in 2025.
| Spelling | Babies 2025 | Official rank | Babies 2021–2025 |
|---|---|---|---|
| Seamus | 154 | #1,280 | 717 |
| Shamus | 9 | #8,803 | 36 |
Spellings count together when they sound the same in American English and are used for the same sex; nicknames and forms that sound different (such as Theo and Theodore) are kept apart. How we group spellings.
How many kids will share the name Seamus?
154 of the 3,606,400 babies born in the US in 2025 were named Seamus (0.04 per 1,000 births). For a boy named Seamus born in 2025, the chance that another child with the same name is in a class of 20 children the same age is under 1 in 50. If every grade liked the name as much as the 2025 babies do, only about one elementary school in 54 (of 430 pupils) would have a child named Seamus.
Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.
How old are people named Seamus?
About 7,600 people born in the US named Seamus are alive today, with a median age of 19; half are between 12 and 27. That makes Seamus mostly worn by children and young adults.
Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.
Seamus by state
How common Seamus was among boys born in each state in 2021–2025. It is notably more common than nationally in Massachusetts (6.7×), Pennsylvania (2.8×), New York (1.9×), New Jersey (1.9×). In 31 states fewer than five boys a year got the name, too few for SSA to publish, so those states show as zero.
Names with a similar history
These names rose and fell in step with Seamus: their share of US boys followed the most similar curve since 1880. If you like Seamus, they share its era and feel.
Questions about the name Seamus
How popular is the name Seamus?
Seamus was the 1280th most popular name for boys in 2025, given to 154 babies. Its best year was 2003, when it ranked 735th; the most babies were born in 2008 (298). Over the last ten years it has moved down 334 places. More babies were named Seamus in the 2000s than in any other decade.
Is Seamus a boy or girl name?
In 2021–2025, almost always a boy’s name given the name Seamus in the US.
Where is Seamus most popular?
In 2021–2025, Seamus was most common in Massachusetts (0.55 per 1,000 boys), followed by Connecticut and Pennsylvania.