Girls' name · peaked in 2008
Kiley name popularity since 1925
20,272 babies born in the US from 1925 to 2025 were named Kiley (94.6% girls, 5.4% boys). Half of them were born in 2003 or earlier, so the typical Kiley is about 23 years old in 2026. Kiley peaked in 2008 as the #307 name for girls, and it was outside the top 1,000 in 2025.
Key facts
- US babies since 1925
- 20,272
- Named Kiley, 1925–2025
- In 2025
- Not top 1,000
- #2,798 for girls in 2025
- Girls / boys
- 94.6% girls
- 19,175 girls · 1,097 boys
- Most popular in
- Iowa
- 1.70× its national share
Peak year is the year Kiley made up the largest share of US girls, in records going back to 1880. Typical age is based on births from 1925 on, not on who is living today.
Kiley births per year, 1925–2025
2008 was the biggest year for Kiley both by count and as a share of all babies.
- Fastest rise: Between 1994 and 1999, Kiley became 1.9× more common, from 1 in 5,820 baby girls to 1 in 3,010.
- Steepest fall: Between 2013 and 2018, its share of baby girls fell by 73%, from 1 in 3,130 to 1 in 11,700.
Shaded on the chart. Both compare Kiley's share of all US girls five years apart, counting only years with at least 100 babies named Kiley.
Decade by decade
Babies named Kiley in each decade, and its rank among girls' names in the middle year of the decade (1935, 1945 … 2025).
| Decade | Girls | Boys | Rank |
|---|---|---|---|
| 1925–29 | 0 | 0 | – |
| 1930s | 0 | 0 | Under 5 |
| 1940s | 0 | 0 | Under 5 |
| 1950s | 5 | 0 | Under 5 |
| 1960s | 27 | 23 | Under 5 |
| 1970s | 783 | 535 | #2,539 |
| 1980s | 1,931 | 258 | #932 |
| 1990s | 3,741 | 198 | #615 |
| 2000s | 8,121 | 72 | #385 |
| 2010s | 4,133 | 11 | #900 |
| 2020–25 | 434 | 0 | #2,798 |
Ranks count every name given to at least 5 girls that year, so they can go past 1,000. "Under 5" means fewer than 5 girls got the name.
Generation fingerprint
58.7% of babies named Kiley from 1925 to 2025 were born in the Gen Z years (1997–2012). The full split by generation:
Where Kiley is most popular
The index compares Kiley'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 Kiley.
| State | Index | Babies |
|---|---|---|
| Iowa | 1.70× | 369 |
| Arizona | 1.52× | 336 |
| Florida | 1.49× | 920 |
| Washington | 1.46× | 416 |
| Oklahoma | 1.45× | 322 |
Other spellings
Spellings that sound like Kiley and were given to at least 1,000 girls from 1925 to 2025, with the year each one was most popular.
| Spelling | Girls | Peak year |
|---|---|---|
| Kiley (this page) | 19,175 | 2008 |
| Kilee | 1,826 | 2008 |
| Kyley | 1,603 | 2002 |
Names with a similar story
Of the other 1999 names on this site, these six had the share of babies closest in shape to Kiley's from 1925 to 2025, however common each one got. Each line is scaled to its own high; the dashed line is Kiley.
Names from the same era
Other common names that peaked within two years of Kiley (2008).
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