How old is someone named Isaias?
The average Isaias is 18 years old.
Half of all living Isaiases are between 7 and 25.
When was Isaias popular?
Most of the Isaiases in the country were born in the last 15 years. The name peaked in 2025 and is still near the top.
Popular names of 2025 · The most popular names of the 2020s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1910s | 18 | 0 |
| 1920s | 98 | 0 |
| 1930s | 144 | under 100 |
| 1940s | 150 | under 100 |
| 1950s | 222 | 150 |
| 1960s | 242 | 200 |
| 1970s | 502 | 450 |
| 1980s | 985 | 930 |
| 1990s | 2,335 | 2,300 |
| 2000s | 4,664 | 4,600 |
| 2010s | 5,212 | 5,200 |
| 2020s | 4,072 | 4,000 |
How many Isaiases are still alive?
About 18,000 Isaiases are alive in the US today. That's 96% of the roughly 19,000 babies named Isaias since 1915.
Nearly every Isaias ever born is still alive, because almost all of them are young.
What generation is the name Isaias?
About two in five living Isaiases are in Gen Alpha, born in 2013 or later.
- Boomer 2%
- Gen X 4%
- Millennial 12%
- Gen Z 39%
- Gen Alpha 43%
Is Isaias an old name?
Not really. Isaias is younger than 74 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Isaias will be 29 in 2056, so the name is aging slowly.
Is Isaias a boy or girl name?
Almost entirely boys: over 99.9% of living Isaiases are men.
Names the same age as Isaias
NAME TWIN
Isaias's name twin is Kieran. Of all 3,713 names on AgeByName, Kieran's age curve is the closest match to Isaias's: 95% alike.
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Questions about the name Isaias
How old is the average Isaias?
The average Isaias in the US is 18 years old. The median is 16, so half are older and half younger.
How many people are named Isaias?
About 18,000 Isaiases are alive in the US today, out of roughly 19,000 babies given the name since 1915.
When was the name Isaias most popular?
In 2025, when about 760 baby boys were named Isaias.
Is Isaias a Gen Alpha name?
Partly. Gen Alpha are the largest group, about 43% of living Isaiases, 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