Boys' name · peaked in 2001
Isiah name popularity since 1925
22,266 babies born in the US from 1925 to 2025 were named Isiah. Half of them were born in 1998 or earlier, so the typical Isiah is about 28 years old in 2026. Isiah peaked in 2001 as the #336 name for boys, and it was outside the top 1,000 in 2025.
Key facts
- US babies since 1925
- 22,266
- Named Isiah, 1925–2025
- In 2025
- Not top 1,000
- #1,480 for boys in 2025
- Girls / boys
- 100.0% boys
- 11 girls · 22,255 boys
- Most popular in
- South Carolina
- 3.57× its national share
Peak year is the year Isiah 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.
Isiah births per year, 1925–2025
2001 was the biggest year for Isiah both by count and as a share of all babies.
- Fastest rise: Between 1986 and 1991, Isiah became 3.8× more common, from 1 in 17,200 baby boys to 1 in 4,500.
- Steepest fall: Between 2009 and 2014, its share of baby boys fell by 61%, from 1 in 3,990 to 1 in 10,300.
Shaded on the chart. Both compare Isiah's share of all US boys five years apart, counting only years with at least 100 babies named Isiah.
Decade by decade
Babies named Isiah in each decade, and its rank among boys' names in the middle year of the decade (1935, 1945 … 2025).
| Decade | Girls | Boys | Rank |
|---|---|---|---|
| 1925–29 | 0 | 613 | – |
| 1930s | 0 | 964 | #627 |
| 1940s | 0 | 1,056 | #659 |
| 1950s | 0 | 1,009 | #701 |
| 1960s | 0 | 687 | #1,026 |
| 1970s | 0 | 541 | #1,095 |
| 1980s | 0 | 1,653 | #779 |
| 1990s | 6 | 5,471 | #463 |
| 2000s | 5 | 7,042 | #387 |
| 2010s | 0 | 2,408 | #1,090 |
| 2020–25 | 0 | 811 | #1,480 |
Ranks count every name given to at least 5 boys that year, so they can go past 1,000.
Generation fingerprint
46.8% of babies named Isiah from 1925 to 2025 were born in the Gen Z years (1997–2012). The full split by generation:
Where Isiah is most popular
The index compares Isiah'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 Isiah.
| State | Index | Babies |
|---|---|---|
| South Carolina | 3.57× | 957 |
| New Mexico | 3.08× | 326 |
| Mississippi | 2.69× | 625 |
| Louisiana | 2.55× | 875 |
| Georgia | 1.76× | 933 |
Other spellings
Spellings that sound like Isiah and were given to at least 1,000 boys from 1925 to 2025, with the year each one was most popular.
| Spelling | Boys | Peak year |
|---|---|---|
| Isiah (this page) | 22,255 | 2001 |
| Isaiah | 251,706 | 2006 |
| Issiah | 1,397 | 1998 |
| Iziah | 1,326 | 2010 |
Names with a similar story
Of the other 1999 names on this site, these six had the share of babies closest in shape to Isiah's from 1925 to 2025, however common each one got. Each line is scaled to its own high; the dashed line is Isiah.
Names from the same era
Other common names that peaked within two years of Isiah (2001).
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