Isaias Boy
How popular is Isaias?
#426 boy name in 2025
755 baby boys were named Isaias in the US in 2025, making it the 426th most popular boy name.
Isaias popularity over time
| Rank in 2025 | #426 for boys (▲ 23 from 2024) |
|---|---|
| Babies in 2025 | 755 boys |
| 10-year trend | Rising (+45% babies vs 2015) |
| Earlier ranks | #551 in 2015, #472 in 2020 |
| Peak year | 2025 (755 boys) |
| Highest rank | #426 in 2025 |
| First recorded | 1915 |
| Boys vs girls (last 10 years) | 100% boys, 0% girls |
| Chance a classmate shares it | 0.5% in a class of 25 kids born in 2025 |
Isaias counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Isaias family of names ranked #398 for boys in 2025 (#426 the year before), with 806 babies in all.
| Spelling | Boys in 2025 | Share |
|---|---|---|
| Isaias | 755 | 94% |
| Izaias | 34 | 4% |
| Isaiahs | 5 | 1% |
| Izayus | 6 | 1% |
| Izayis | 6 | 1% |
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 Isaias is most popular
Babies named Isaias per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
- New Mexico: 0.9 per 1,000 (31 boys)
- Texas: 0.8 per 1,000 (713 boys)
- California: 0.8 per 1,000 (694 boys)
- Arizona: 0.7 per 1,000 (109 boys)
- Colorado: 0.6 per 1,000 (78 boys)
Isaias by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1910s | 18 | #3,391 |
| 1920s | 98 | #1,523 |
| 1930s | 144 | #1,498 |
| 1940s | 150 | #1,444 |
| 1950s | 222 | #1,377 |
| 1960s | 242 | #1,427 |
| 1970s | 502 | #1,016 |
| 1980s | 985 | #827 |
| 1990s | 2,335 | #579 |
| 2000s | 4,664 | #481 |
| 2010s | 5,212 | #494 |
| 2020s | 4,072 | #426 |
Boy names about as popular as Isaias
Questions
- Is Isaias a boy or girl name?
- Isaias is mostly a boy name. Over the last 10 years, 100% of babies named Isaias were boys.
- How popular is the name Isaias?
- 755 baby boys were named Isaias in the US in 2025, making it the 426th most popular boy name.
- When was Isaias most popular?
- Isaias peaked in 2025, when 755 boys were given the name. Its highest rank was #426 in 2025.
- How many people are named Isaias?
- 18,644 babies have been named Isaias in the US since 1880. We estimate about 17,941 of them are alive in 2026, with a median age of 16.
- Where is Isaias most popular?
- From 2021 to 2025, Isaias was most common in New Mexico, at 0.9 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.