How old is someone named Kailey?
The average Kailey is 21 years old.
Half of all living Kaileys are between 16 and 27.
When was Kailey popular?
Kailey was a boom name: it shot up, peaked in 2004, and dropped away. That's why most Kaileys are close to the same age.
Popular names of 2004 · The most popular names of the 2000s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1970s | 10 | under 100 |
| 1980s | 1,006 | 980 |
| 1990s | 6,830 | 6,700 |
| 2000s | 11,846 | 12,000 |
| 2010s | 6,154 | 6,100 |
| 2020s | 1,408 | 1,400 |
How many Kaileys are still alive?
About 27,000 Kaileys are alive in the US today. That's 99% of the roughly 27,000 babies named Kailey since 1970.
Nearly every Kailey ever born is still alive, because almost all of them are young.
What generation is the name Kailey?
About two in three living Kaileys are in Gen Z, born between 1997 and 2012.
- Millennial 18%
- Gen Z 64%
- Gen Alpha 19%
Is Kailey an old name?
Not really. Kailey is younger than 67 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Kailey will be 45 in 2056, so the name is getting older.
Is Kailey a boy or girl name?
Almost entirely girls: over 99.9% of living Kaileys are women.
Names the same age as Kailey
NAME TWIN
Kailey's name twin is Jazmyn. Of all 3,713 names on AgeByName, Jazmyn's age curve is the closest match to Kailey's: 95% alike.
Other spellings: Kayleigh (20) · Kaylie (21) · Kaleigh (24) · Kaley (26) · Kayley (23) · Kayli (23)
Think you can guess a Jessica's age?
Ten names, one slider each. Share your score.
Questions about the name Kailey
How old is the average Kailey?
The average Kailey in the US is 21 years old. The median is 22, so half are older and half younger.
How many people are named Kailey?
About 27,000 Kaileys are alive in the US today, out of roughly 27,000 babies given the name since 1970.
When was the name Kailey most popular?
In 2004, when about 1,400 baby girls were named Kailey.
Is Kailey a Gen Z name?
Yes. About 64% of living Kaileys are in Gen Z, born between 1997 and 2012.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). Updated each spring. How we calculate this