Boys' name · peaked in 2025
Kieran name popularity since 1925
19,192 babies born in the US from 1925 to 2025 were named Kieran (8.4% girls, 91.6% boys). Half of them were born in 2010 or earlier, so the typical Kieran is about 16 years old in 2026. Kieran peaked in 2025 as the #389 name for boys, and it ranked #389 in 2025.
Key facts
- US babies since 1925
- 19,192
- Named Kieran, 1925–2025
- In 2025
- #389
- for boys in 2025 (817 babies)
- Girls / boys
- 91.6% boys
- 1,605 girls · 17,587 boys
- Most popular in
- Colorado
- 2.15× its national share
Peak year is the year Kieran 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.
Kieran births per year, 1925–2025
2025 was the biggest year for Kieran both by count and as a share of all babies.
- Fastest rise: Between 1991 and 1996, Kieran became 2.8× more common, from 1 in 19,200 baby boys to 1 in 6,810.
Shaded on the chart. This compares Kieran's share of all US boys five years apart, counting only years with at least 100 babies named Kieran.
Decade by decade
Babies named Kieran 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 | 20 | – |
| 1930s | 0 | 48 | #3,926 |
| 1940s | 5 | 81 | #3,558 |
| 1950s | 11 | 222 | #1,523 |
| 1960s | 49 | 374 | #1,101 |
| 1970s | 59 | 415 | #1,370 |
| 1980s | 119 | 610 | #1,162 |
| 1990s | 327 | 2,177 | #638 |
| 2000s | 591 | 4,412 | #571 |
| 2010s | 341 | 5,282 | #512 |
| 2020–25 | 103 | 3,946 | #389 |
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 Kieran from 1925 to 2025 were born in the Gen Alpha years (2013–2025). The full split by generation:
Where Kieran is most popular
The index compares Kieran'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 Kieran.
| State | Index | Babies |
|---|---|---|
| Colorado | 2.15× | 404 |
| New Jersey | 2.14× | 897 |
| Washington | 2.11× | 537 |
| Minnesota | 2.05× | 569 |
| New York | 1.99× | 2,301 |
Names with a similar story
Of the other 1999 names on this site, these six had the share of babies closest in shape to Kieran's from 1925 to 2025, however common each one got. Each line is scaled to its own high; the dashed line is Kieran.
Names from the same era
Other common names that peaked within two years of Kieran (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