Kailyn
Girl name · #1827 in 2025 · Very rare
How old is the name Kailyn? In official American birth records, Kailyn has been tracked continuously since 1981, giving it 44 years of documented American history.
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: Official national birth records.
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
How old is the name Kailyn?
In official American birth records, the name Kailyn first appeared in 1981 (over 44 years ago), when 6 newborn girls received the name. It has been tracked in modern national records for 44 years.
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: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.