How Many People Are Named Cailyn?
people named Cailyn are alive in the United States today (estimate)
About 1 in 62,165 people in the US has this name
Based on 5,554 babies named Cailyn in Social Security records from 1979 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Peak Year
401 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
Variant of KAYLYN.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
Same Sound, Other Spellings
These names are pronounced like Cailyn in English. Counting Cailyn and these spellings together, about 90,205 people alive in the US have the name.
⚧ Gender Distribution
Almost all of the babies given the name Cailyn (99.9%) were girls.
👥 Age Distribution
The average person named Cailyn alive today is about 18 years old, and 92% are under 30. Half of them were between 13 and 23 in 2025.
📈 Popularity Over Time
Cailyn first appears in the records in 1979 and was given most often in 2009, to 401 babies. In 2025, 45 babies got the name.
Babies given the name each year, 1979 to 2025
🏆 Rank History
Cailyn has never been one of the 100 most popular girls' names. Its best rank was #725, in 2009. In 2025 it ranked #3,727.
| Girls | |
|---|---|
| Rank in 2025 | #3,727 |
| Best rank | #725 (2009) |
| Years in the top 100 | None |
| Rank in its biggest decade | #1,007 in the 2000s |
📍 State-Wise Distribution
People named Cailyn alive today, by the state where they were born (estimate; state records start in 1910).
More people named Cailyn were born in Texas than in any other state: about 432 of those alive today. Compared with the national rate in the same years, Cailyn was given 1.9 times as often in Mississippi, 1.7 times in Alabama and 1.7 times in Georgia.
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