How old is someone named Seth?
The average Seth is 31 years old.
Half of all living Seths are between 22 and 40.
When was Seth popular?
Parents have been choosing Seth less often since its peak in 2000; 505 babies got the name in 2025.
Popular names of 2000 · The most popular names of the 2000s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 181 | 0 |
| 1910s | 642 | 0 |
| 1920s | 874 | 0 |
| 1930s | 612 | under 100 |
| 1940s | 852 | 380 |
| 1950s | 2,101 | 1,400 |
| 1960s | 3,792 | 3,100 |
| 1970s | 16,669 | 15,000 |
| 1980s | 31,318 | 29,000 |
| 1990s | 42,316 | 41,000 |
| 2000s | 48,259 | 47,000 |
| 2010s | 14,686 | 15,000 |
| 2020s | 3,548 | 3,500 |
How many Seths are still alive?
About 160,000 Seths are alive in the US today. That's 94% of the roughly 170,000 babies named Seth since 1880.
Nearly every Seth ever born is still alive, because almost all of them are young.
What generation is the name Seth?
About two in five living Seths are in Gen Z, born between 1997 and 2012.
- Boomer 2%
- Gen X 13%
- Millennial 34%
- Gen Z 44%
- Gen Alpha 8%
Is Seth an old name?
Somewhat. Seth is older than 53 in 100 names on AgeByName, but younger than plenty of classics.
Looking ahead: if babies keep getting the name at today's pace, the typical Seth will be 54 in 2056, so the name is getting older.
Is Seth a boy or girl name?
Almost entirely boys: 99.7% of living Seths are men.
Names the same age as Seth
NAME TWIN
Seth's name twin is Nathanial. Of all 3,713 names on AgeByName, Nathanial's age curve is the closest match to Seth's: 93% alike.
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Questions about the name Seth
How old is the average Seth?
The average Seth in the US is 31 years old. The median is 29, so half are older and half younger.
How many people are named Seth?
About 160,000 Seths are alive in the US today, out of roughly 170,000 babies given the name since 1880.
When was the name Seth most popular?
In 2000, when about 6,700 baby boys were named Seth.
Is Seth a Gen Z name?
Partly. Gen Z are the largest group, about 44% of living Seths, but the name spans several generations.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). Updated each spring. How we calculate this