Kailyn
Girl name · #1827 in 2025 · Very rare
In 2025, 110 baby girls were named Kailyn, placing it at #1827 in the official national rankings. A decade ago it stood at #659, so the name has been falling over the past ten years. Roughly one in every 16,364 girls born in 2025 was named Kailyn.
The 44-year story
Kailyn first appears in the Social Security records in 1981, when 6 girls received the name. Its peak came in 2011, when 793 girls were named Kailyn — good for #397 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Babies named Kailyn per year. Source: SSA.
Unlock the 5-year forecast and compare Kailyn against up to 5 other names.
Uniqueness: will there be another Kailyn in class?
On our rarity read — which blends how common Kailyn is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Kailyn will likely be the only one in the room, with the occasional spelling-out as the price.
Where Kailyn is most common
State-level data for Kailyn is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
Names like Kailyn
Statistically, parents drawn to Kailyn tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Kaelyn, Jaelyn, Joslyn, Joselyn, and Jazzlyn.
KaelynJaelynJoslynJoselynJazzlynJailynEmelynCailyn
Rank history (last 25 years)
| Year | Babies named Kailyn | Rank |
|---|---|---|
| 2025 | 110 | #1818 |
| 2024 | 133 | #1579 |
| 2023 | 155 | #1439 |
| 2022 | 158 | #1422 |
| 2021 | 180 | #1280 |
| 2020 | 193 | #1196 |
| 2019 | 247 | #1036 |
| 2018 | 264 | #992 |
| 2017 | 298 | #899 |
| 2016 | 355 | #801 |
| 2015 | 436 | #659 |
| 2014 | 606 | #512 |
| 2013 | 609 | #492 |
| 2012 | 623 | #493 |
| 2011 | 793 | #397 |
| 2010 | 696 | #443 |
| 2009 | 706 | #447 |
| 2008 | 706 | #446 |
| 2007 | 663 | #491 |
| 2006 | 626 | #492 |
| 2005 | 583 | #511 |
| 2004 | 533 | #533 |
| 2003 | 499 | #552 |
| 2002 | 438 | #589 |
| 2001 | 399 | #627 |
Frequently asked questions
Is Kailyn a popular girl name?
Kailyn ranked #1827 among girls in 2025 with 110 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #659.
When was the name Kailyn most popular?
Kailyn peaked in 2011, when 793 American girls received the name (ranked #397 that year). Since 2011 the name has declined from that high.
How rare is the name Kailyn?
In 2025, roughly 1 in 16,364 newborn American girls was named Kailyn. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.