Cailyn is an uncommon girls' name that peaked in 2009 and has since faded.
Cailyn is predominantly a girl name. In 2025 it ranked #3,728 among girls (40) and #12,347 among boys (5) — overall #6,015 across all names. The charts below show girls and boys separately.
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 45 | 45 | #3,728 | #12,347 |
| 2024 | 48 | 48 | #3,293 | — |
| 2023 | 53 | 53 | #3,105 | — |
| 2022 | 65 | 65 | #2,666 | — |
| 2021 | 55 | 55 | #3,011 | — |
| 2020 | 70 | 70 | #2,474 | — |
| 2019 | 70 | 70 | #2,513 | — |
| 2018 | 67 | 67 | #2,588 | — |
| 2017 | 87 | 87 | #2,186 | — |
| 2016 | 114 | 114 | #1,818 | — |
| 2015 | 177 | 177 | #1,339 | — |
| 2014 | 178 | 178 | #1,328 | — |
| 2013 | 219 | 219 | #1,112 | — |
| 2012 | 256 | 256 | #985 | — |
| 2011 | 301 | 301 | #869 | — |
| 2010 | 322 | 322 | #836 | — |
| 2009 | 401 | 401 | #725 | — |
| 2008 | 399 | 399 | #742 | — |
| 2007 | 276 | 276 | #974 | — |
| 2006 | 306 | 306 | #870 | — |
| 2005 | 209 | 209 | #1,125 | — |
| 2004 | 206 | 206 | #1,107 | — |
| 2003 | 186 | 186 | #1,161 | — |
| 2002 | 172 | 172 | #1,189 | — |
| 2001 | 127 | 127 | #1,477 | — |
| 2000 | 163 | 163 | #1,219 | — |
| 1999 | 151 | 151 | #1,245 | — |
| 1998 | 157 | 157 | #1,185 | — |
| 1997 | 129 | — | #1,336 | — |
| 1996 | 94 | — | #1,626 | — |
| 1995 | 88 | — | #1,674 | — |
| 1994 | 77 | — | #1,841 | — |
| 1993 | 53 | — | #2,385 | — |
| 1992 | 41 | — | #2,876 | — |
| 1991 | 23 | — | #4,356 | — |
| 1990 | 44 | — | #2,649 | — |
| 1989 | 25 | — | #3,908 | — |
| 1988 | 27 | — | #3,493 | — |
| 1987 | 13 | — | #5,640 | — |
| 1986 | 11 | — | #6,216 | — |
| 1985 | 18 | — | #4,299 | — |
| 1984 | 11 | — | #5,944 | — |
| 1983 | 8 | — | #7,398 | — |
| 1982 | 7 | — | #8,336 | — |
| 1979 | 5 | — | #10,396 | — |