Girls' name · peaked in 2004
Kailey name popularity since 1925
27,254 babies born in the US from 1925 to 2025 were named Kailey. Half of them were born in 2004 or earlier, so the typical Kailey is about 22 years old in 2026. Kailey peaked in 2004 as the #228 name for girls, and it was outside the top 1,000 in 2025.
Key facts
- US babies since 1925
- 27,254
- Named Kailey, 1925–2025
- In 2025
- Not top 1,000
- #1,420 for girls in 2025
- Girls / boys
- 100.0% girls
- 27,244 girls · 10 boys
- Most popular in
- Arizona
- 1.67× its national share
Peak year is the year Kailey 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.
Kailey births per year, 1925–2025
2004 was the biggest year for Kailey both by count and as a share of all babies.
- Fastest rise: Between 1987 and 1992, Kailey became 3× more common, from 1 in 10,300 baby girls to 1 in 3,490.
- Steepest fall: Between 2020 and 2025, its share of baby girls fell by 52%, from 1 in 5,020 to 1 in 10,500.
Shaded on the chart. Both compare Kailey's share of all US girls five years apart, counting only years with at least 100 babies named Kailey.
Decade by decade
Babies named Kailey 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 | 0 | 0 | Under 5 |
| 1960s | 0 | 0 | Under 5 |
| 1970s | 10 | 0 | Under 5 |
| 1980s | 1,006 | 0 | #1,500 |
| 1990s | 6,830 | 0 | #391 |
| 2000s | 11,836 | 10 | #251 |
| 2010s | 6,154 | 0 | #531 |
| 2020–25 | 1,408 | 0 | #1,420 |
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
63.5% of babies named Kailey from 1925 to 2025 were born in the Gen Z years (1997–2012). The full split by generation:
Where Kailey is most popular
The index compares Kailey'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 Kailey.
| State | Index | Babies |
|---|---|---|
| Arizona | 1.67× | 561 |
| Florida | 1.63× | 1,528 |
| Washington | 1.54× | 670 |
| Utah | 1.51× | 333 |
| Texas | 1.33× | 2,706 |
Other spellings
Spellings that sound like Kailey 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 |
|---|---|---|
| Kailey (this page) | 27,244 | 2004 |
| Kailee | 12,925 | 2003 |
| Kayley | 8,586 | 1999 |
| Cailey | 3,857 | 1999 |
| Kaili | 2,890 | 2003 |
| Kaily | 2,560 | 2010 |
| Kailie | 1,324 | 1999 |
Names with a similar story
Of the other 1999 names on this site, these six had the share of babies closest in shape to Kailey's from 1925 to 2025, however common each one got. Each line is scaled to its own high; the dashed line is Kailey.
Names from the same era
Other common names that peaked within two years of Kailey (2004).
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