Boys' name · peaked in 2025
Isaias name popularity since 1925
18,592 babies born in the US from 1925 to 2025 were named Isaias. Half of them were born in 2009 or earlier, so the typical Isaias is about 17 years old in 2026. Isaias peaked in 2025 as the #426 name for boys, and it ranked #426 in 2025.
Key facts
- US babies since 1925
- 18,592
- Named Isaias, 1925–2025
- In 2025
- #426
- for boys in 2025 (755 babies)
- Girls / boys
- 100.0% boys
- 0 girls · 18,592 boys
- Most popular in
- Texas
- 3.30× its national share
Peak year is the year Isaias made up the largest share of US boys, in records going back to 1880. Typical age is based on births from 1925 on, not on who is living today.
Isaias births per year, 1925–2025
2025 was the biggest year for Isaias both by count and as a share of all babies.
- Fastest rise: Between 1991 and 1996, Isaias became 1.9× more common, from 1 in 12,200 baby boys to 1 in 6,580.
Shaded on the chart. This compares Isaias's share of all US boys five years apart, counting only years with at least 100 babies named Isaias.
Decade by decade
Babies named Isaias in each decade, and its rank among boys' names in the middle year of the decade (1935, 1945 … 2025).
| Decade | Boys | Rank |
|---|---|---|
| 1925–29 | 64 | – |
| 1930s | 144 | #1,563 |
| 1940s | 150 | #1,468 |
| 1950s | 222 | #1,930 |
| 1960s | 242 | #1,573 |
| 1970s | 502 | #1,351 |
| 1980s | 985 | #936 |
| 1990s | 2,335 | #689 |
| 2000s | 4,664 | #518 |
| 2010s | 5,212 | #552 |
| 2020–25 | 4,072 | #426 |
Ranks count every name given to at least 5 boys that year, so they can go past 1,000.
Generation fingerprint
41.8% of babies named Isaias from 1925 to 2025 were born in the Gen Alpha years (2013–2025). The full split by generation:
Where Isaias is most popular
The index compares Isaias's share of babies in each state with its share nationwide, 1925–2025 (1.50× = 50% more common). States with at least 300 babies named Isaias.
| State | Index | Babies |
|---|---|---|
| Texas | 3.30× | 4,307 |
| California | 2.82× | 4,971 |
| Arizona | 2.70× | 584 |
| Colorado | 1.57× | 323 |
| Florida | 1.46× | 879 |
Names with a similar story
Of the other 1999 names on this site, these six had the share of babies closest in shape to Isaias's from 1925 to 2025, however common each one got. Each line is scaled to its own high; the dashed line is Isaias.
Names from the same era
Other common names that peaked within two years of Isaias (2025).
Source: U.S. Social Security Administration national and state baby-name data, which covers names given to at least 5 babies of one sex in a year. About the data