Kailyn is an established girls' name that peaked in 2011 and has since faded.
Kailyn is predominantly a girl name. In 2025 it ranked #1,825 among girls (110) and #9,293 among boys (8) — overall #3,168 across all names. The charts below show girls and boys separately.
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 118 | 118 | #1,825 | #9,293 |
| 2024 | 149 | 149 | #1,580 | #5,775 |
| 2023 | 165 | 165 | #1,443 | #7,985 |
| 2022 | 172 | 172 | #1,425 | #6,313 |
| 2021 | 187 | 187 | #1,282 | #10,245 |
| 2020 | 193 | 193 | #1,196 | — |
| 2019 | 255 | 255 | #1,038 | #9,300 |
| 2018 | 264 | 264 | #992 | — |
| 2017 | 298 | 298 | #899 | — |
| 2016 | 355 | 355 | #803 | — |
| 2015 | 441 | 441 | #659 | #13,039 |
| 2014 | 613 | 613 | #512 | #10,175 |
| 2013 | 615 | 615 | #492 | #11,443 |
| 2012 | 629 | 629 | #493 | #11,523 |
| 2011 | 799 | 799 | #397 | #11,555 |
| 2010 | 711 | 711 | #443 | #5,886 |
| 2009 | 706 | 706 | #447 | — |
| 2008 | 713 | 713 | #447 | #10,458 |
| 2007 | 668 | 668 | #491 | #13,380 |
| 2006 | 632 | 632 | #493 | #11,337 |
| 2005 | 583 | 583 | #511 | — |
| 2004 | 533 | 533 | #533 | — |
| 2003 | 499 | 499 | #554 | — |
| 2002 | 438 | 438 | #589 | — |
| 2001 | 399 | 399 | #627 | — |
| 2000 | 438 | 438 | #593 | #8,665 |
| 1999 | 389 | 389 | #619 | — |
| 1998 | 362 | 362 | #651 | #8,017 |
| 1997 | 306 | — | #704 | — |
| 1996 | 295 | — | #715 | — |
| 1995 | 246 | — | #807 | — |
| 1994 | 246 | — | #822 | — |
| 1993 | 212 | — | #908 | — |
| 1992 | 160 | — | #1,113 | — |
| 1991 | 120 | — | #1,363 | — |
| 1990 | 93 | — | #1,610 | — |
| 1989 | 103 | — | #1,436 | — |
| 1988 | 70 | — | #1,793 | — |
| 1987 | 57 | — | #1,971 | — |
| 1986 | 40 | — | #2,485 | — |
| 1985 | 29 | — | #3,119 | — |
| 1984 | 17 | — | #4,399 | — |
| 1983 | 16 | — | #4,562 | — |
| 1982 | 11 | — | #6,107 | — |
| 1981 | 6 | — | #9,633 | — |