How old is someone named Cailyn?
The average Cailyn is 19 years old.
Half of all living Cailyns are between 14 and 24.
When was Cailyn popular?
Cailyn had one big moment, peaking in 2009. 67% of the babies ever named Cailyn arrived in a single 15-year stretch.
Popular names of 2009 · The most popular names of the 2000s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1970s | 5 | under 100 |
| 1980s | 120 | 120 |
| 1990s | 857 | 840 |
| 2000s | 2,445 | 2,400 |
| 2010s | 1,791 | 1,800 |
| 2020s | 336 | 340 |
How many Cailyns are still alive?
About 5,500 Cailyns are alive in the US today. That's 99% of the roughly 5,600 babies named Cailyn since 1979.
Nearly every Cailyn ever born is still alive, because almost all of them are young.
What generation is the name Cailyn?
About two in three living Cailyns are in Gen Z, born between 1997 and 2012.
- Millennial 10%
- Gen Z 68%
- Gen Alpha 23%
Is Cailyn an old name?
Not really. Cailyn is younger than 73 in 100 names on AgeByName.
Is Cailyn a boy or girl name?
Almost entirely girls: 99.9% of living Cailyns are women.
Names the same age as Cailyn
NAME TWIN
Cailyn's name twin is Braydon. Of all 3,713 names on AgeByName, Braydon's age curve is the closest match to Cailyn's: 91% alike.
Other spellings: Kaylin (21) · Kaelyn (19) · Kailyn (19) · Kaylynn (20) · Kaylyn (25) · Kalyn (28)
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Questions about the name Cailyn
How old is the average Cailyn?
The average Cailyn in the US is 19 years old. The median is 18, so half are older and half younger.
How many people are named Cailyn?
About 5,500 Cailyns are alive in the US today, out of roughly 5,600 babies given the name since 1979.
When was the name Cailyn most popular?
In 2009, when about 400 baby girls were named Cailyn.
Is Cailyn a Gen Z name?
Yes. About 68% of living Cailyns 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