Isac Boy
How popular is Isac?
#4,538 boy name in 2025
22 baby boys were named Isac in the US in 2025, making it the 4538th most popular boy name.
Isac popularity over time
| Rank in 2025 | #4,538 for boys (▼ 469 from 2024) |
|---|---|
| Babies in 2025 | 22 boys |
| 10-year trend | Falling (-48% babies vs 2015) |
| Earlier ranks | #2,808 in 2015, #3,731 in 2020 |
| Peak year | 2006 (148 boys) |
| Highest rank | #955 in 1892 |
| First recorded | 1884 |
| Boys vs girls (last 10 years) | 100% boys, 0% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Isac counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Issac family of names ranked #683 for boys in 2025 (#648 the year before), with 370 babies in all.
| Spelling | Boys in 2025 | Share |
|---|---|---|
| Issac | 258 | 70% |
| Izak | 23 | 6% |
| Isac | 22 | 6% |
| Isak | 38 | 10% |
| Isacc | 10 | 3% |
| Izac | 7 | 2% |
| Issak | 5 | 1% |
| Izack | 7 | 2% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Isac is most popular
Babies named Isac per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
- California: 0.0 per 1,000 (24 boys)
- Texas: 0.0 per 1,000 (20 boys)
Isac by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1880s | 5 | #971 |
| 1890s | 11 | #955 |
| 1900s | 33 | #1,110 |
| 1910s | 132 | #1,044 |
| 1920s | 145 | #1,731 |
| 1930s | 81 | #2,101 |
| 1940s | 22 | #2,963 |
| 1950s | 12 | #3,215 |
| 1960s | 21 | #3,536 |
| 1970s | 61 | #3,443 |
| 1980s | 192 | #2,425 |
| 1990s | 543 | #1,353 |
| 2000s | 1,210 | #1,138 |
| 2010s | 577 | #1,558 |
| 2020s | 158 | #3,424 |
Boy names about as popular as Isac
Questions
- Is Isac a boy or girl name?
- Isac is mostly a boy name. Over the last 10 years, 100% of babies named Isac were boys.
- How popular is the name Isac?
- 22 baby boys were named Isac in the US in 2025, making it the 4538th most popular boy name.
- When was Isac most popular?
- Isac peaked in 2006, when 148 boys were given the name. Its highest rank was #955 in 1892.
- How many people are named Isac?
- 3,203 babies have been named Isac in the US since 1880. We estimate about 2,739 of them are alive in 2026, with a median age of 21.
- Where is Isac most popular?
- From 2021 to 2025, Isac was most common in California, at 0.0 of every 1,000 boys born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.