Caitlin vs. Kaitlyn: which name is older?
The average Caitlin is 32 and the average Kaitlyn is 26, so Caitlin is the older name, by about 6 years.
Caitlin and Kaitlyn sound alike, so the spelling is the clue: a Caitlin is more likely to have been born in the late 1980s, and a Kaitlyn in the early 2000s.
Caitlin
Kaitlyn
When was each name popular?
Caitlin peaked first, in 1988 (in the late 1980s). Kaitlyn peaked in 2000, 12 years later.
Which name is more common?
There are about 110,000 Caitlins and about 160,000 Kaitlyns alive in the US, so there are about 50% more Kaitlyns than Caitlins.
Boys or girls?
Both are girls' names: over 99% of living Caitlins and over 99% of living Kaitlyns are women.
Names the same age as Caitlin
Names the same age as Kaitlyn
More comparisons: Kaitlyn vs. Katelyn
Think you can guess a Caitlin's age?
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Caitlin or Kaitlyn: questions
Which is older, Caitlin or Kaitlyn?
The average Caitlin is 32 and the average Kaitlyn is 26, so Caitlin is the older name, by about 6 years.
How old is the average Caitlin?
The average Caitlin in the US is 32; half of all living Caitlins are between 26 and 37.
How old is the average Kaitlyn?
The average Kaitlyn in the US is 26; half of all living Kaitlyns are between 20 and 31.
Which is more common, Caitlin or Kaitlyn?
There are about 110,000 Caitlins and about 160,000 Kaitlyns alive in the US, so there are about 50% more Kaitlyns than Caitlins.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). How we calculate this