How old is someone named Isaiah?
The average Isaiah is 18 years old.
Half of all living Isaiahs are between 11 and 25.
When was Isaiah popular?
Isaiah is a modern favorite: it climbed through the 2000s and hit its high in 2006. 5,273 babies got the name in 2025.
Popular names of 2006 · The most popular names of the 2000s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 263 | 0 |
| 1910s | 845 | 0 |
| 1920s | 1,262 | under 100 |
| 1930s | 1,039 | 130 |
| 1940s | 1,194 | 520 |
| 1950s | 1,180 | 770 |
| 1960s | 727 | 580 |
| 1970s | 1,583 | 1,400 |
| 1980s | 6,765 | 6,400 |
| 1990s | 36,756 | 36,000 |
| 2000s | 93,053 | 92,000 |
| 2010s | 76,458 | 76,000 |
| 2020s | 33,017 | 33,000 |
How many Isaiahs are still alive?
About 250,000 Isaiahs are alive in the US today. That's 96% of the roughly 250,000 babies named Isaiah since 1880.
Nearly every Isaiah ever born is still alive, because almost all of them are young.
What generation is the name Isaiah?
More than half of living Isaiahs are in Gen Z, born between 1997 and 2012.
- Boomer under 1%
- Gen X under 1%
- Millennial 9%
- Gen Z 56%
- Gen Alpha 34%
Is Isaiah an old name?
Not really. Isaiah is younger than 74 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Isaiah will be 35 in 2056, so the name is getting older.
Is Isaiah a boy or girl name?
Almost entirely boys: 99.7% of living Isaiahs are men.
Names the same age as Isaiah
NAME TWIN
Isaiah's name twin is Heaven. Of all 3,713 names on AgeByName, Heaven's age curve is the closest match to Isaiah's: 95% alike.
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Questions about the name Isaiah
How old is the average Isaiah?
The average Isaiah in the US is 18 years old. The median is 18, so half are older and half younger.
How many people are named Isaiah?
About 250,000 Isaiahs are alive in the US today, out of roughly 250,000 babies given the name since 1880.
When was the name Isaiah most popular?
In 2006, when about 10,000 baby boys were named Isaiah.
Is Isaiah a Gen Z name?
Yes. About 56% of living Isaiahs are in Gen Z, born between 1997 and 2012.
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