How old is someone named Isaac?
The average Isaac is 21 years old.
Half of all living Isaacs are between 10 and 27.
When was Isaac popular?
Isaac is a comeback name. It was common in the early 1900s, nearly disappeared by mid-century, and has returned, peaking again in 2007.
Popular names of 2007 · The most popular names of the 2000s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 1,638 | 0 |
| 1910s | 4,959 | 0 |
| 1920s | 6,569 | under 100 |
| 1930s | 4,736 | 580 |
| 1940s | 5,089 | 2,200 |
| 1950s | 5,511 | 3,600 |
| 1960s | 4,631 | 3,700 |
| 1970s | 10,568 | 9,500 |
| 1980s | 18,518 | 17,000 |
| 1990s | 40,387 | 39,000 |
| 2000s | 90,935 | 90,000 |
| 2010s | 94,677 | 94,000 |
| 2020s | 40,028 | 40,000 |
How many Isaacs are still alive?
About 300,000 Isaacs are alive in the US today. That's 90% of the roughly 330,000 babies named Isaac since 1880.
Nearly every Isaac ever born is still alive, because almost all of them are young.
What generation is the name Isaac?
About half of living Isaacs are in Gen Z, born between 1997 and 2012.
Is Isaac an old name?
Not really. Isaac is younger than 68 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Isaac will be 35 in 2056, so the name is aging slowly.
Is Isaac a boy or girl name?
Almost entirely boys: 99.8% of living Isaacs are men.
Names the same age as Isaac
NAME TWIN
Isaac's name twin is Juliana. Of all 3,713 names on AgeByName, Juliana's age curve is the closest match to Isaac's: 95% alike.
Other spellings: Issac (25)
Compare: Isaac vs. Issac
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Questions about the name Isaac
How old is the average Isaac?
The average Isaac in the US is 21 years old. The median is 18, so half are older and half younger.
How many people are named Isaac?
About 300,000 Isaacs are alive in the US today, out of roughly 330,000 babies given the name since 1880.
When was the name Isaac most popular?
In 2007, when about 10,000 baby boys were named Isaac.
Is Isaac a Gen Z name?
Partly. Gen Z are the largest group, about 45% of living Isaacs, 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