Cailyn
Cailyn was the 3728th most popular name for girls in 2025, given to 40 babies. Its best year was 2009, when it ranked 725th with 401 babies. Over the last ten years it has moved down 2,389 places. More babies were named Cailyn in the 2000s than in any other decade.
Meaning Not yet researched how we research meanings
- Rank in 2025
- #3,728 girls, down 1,254 places since 2020
- Babies in 2025
- 40girls
- Girls and boys
- Almost always a girl’s name2021–2025
- Peak year
- 2009401 babies
- Total since 1880
- 5,554babies recorded
Cailyn popularity since 1880
A few boys are given the name too: 5 since 2025, 5 in 2025.
| Year | Rank (girls) | Babies (girls) |
|---|---|---|
| 2025 | #3,728 | 40 |
| 2020 | #2,474 | 70 |
| 2010 | #836 | 322 |
| 2000 | #1,219 | 163 |
| 1990 | #2,649 | 44 |
| 1980 | — | — |
| 1970 | — | — |
| 1960 | — | — |
| 1950 | — | — |
| 1940 | — | — |
| 1930 | — | — |
| 1920 | — | — |
| 1910 | — | — |
| 1900 | — | — |
| 1890 | — | — |
| 1880 | — | — |
How popular is Cailyn, counting every spelling?
Cailyn is a spelling of Kaylin, a name family that ranked #295 for girls in 2025 once every spelling is counted together, compared with #3,728 for Cailyn on its own. Together these spellings went to 1,103 girls in 2025.
| Spelling | Babies 2025 | Official rank | Babies 2021–2025 |
|---|---|---|---|
| Kaylin | 126 | #1,644 | 834 |
| Kaylynn | 134 | #1,576 | 774 |
| Kailyn | 110 | #1,825 | 736 |
| Kaelyn | 131 | #1,601 | 728 |
| Kayleen | 70 | #2,524 | 559 |
| Kaelynn | 79 | #2,310 | 537 |
| Kailynn | 78 | #2,343 | 501 |
| Kaylyn | 70 | #2,525 | 372 |
| Kaylen | 61 | #2,796 | 363 |
| Cailyn | 40 | #3,728 | 261 |
| Kaileen | 33 | #4,299 | 242 |
| Kaylene | 37 | #3,947 | 224 |
Spellings count together when they sound the same in American English and are used for the same sex; nicknames and forms that sound different (such as Theo and Theodore) are kept apart. How we group spellings.
How many kids will share the name Cailyn?
40 of the 3,606,400 babies born in the US in 2025 were named Cailyn (0.01 per 1,000 births). For a girl named Cailyn born in 2025, the chance that another child with the same name is in a class of 20 children the same age is under 1 in 50. If every grade liked the name as much as the 2025 babies do, only about one elementary school in 210 (of 430 pupils) would have a child named Cailyn.
Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.
How old are people named Cailyn?
About 5,500 people born in the US named Cailyn are alive today, with a median age of 18; half are between 14 and 24. That makes Cailyn mostly worn by children and young adults.
Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.
Cailyn by state
How common Cailyn was among girls born in each state in 2021–2025. In 45 states fewer than five girls a year got the name, too few for SSA to publish, so those states show as zero.
Names with a similar history
These names rose and fell in step with Cailyn: their share of US girls followed the most similar curve since 1880. If you like Cailyn, they share its era and feel.
Questions about the name Cailyn
How popular is the name Cailyn?
Cailyn was the 3728th most popular name for girls in 2025, given to 40 babies. Its best year was 2009, when it ranked 725th with 401 babies. Over the last ten years it has moved down 2,389 places. More babies were named Cailyn in the 2000s than in any other decade.
Is Cailyn a boy or girl name?
In 2021–2025, almost always a girl’s name given the name Cailyn in the US.
Where is Cailyn most popular?
In 2021–2025, Cailyn was most common in Georgia (0.07 per 1,000 girls), followed by Alabama and Pennsylvania.