Kollyn is a very rare name used for both girls and boys that peaked in 2023 and remains in steady use.
Kollyn is predominantly a boy name. It last appears in U.S. records in 2025. Kollyn first appears in 1994 and peaked in 2009 (13 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 18 | 18 | #6,447 | — |
| 2024 | 5 | 5 | #16,570 | — |
| 2023 | 20 | 20 | #7,472 | #13,308 |
| 2022 | 15 | 15 | #7,479 | — |
| 2021 | 19 | 19 | #7,849 | #13,219 |
| 2020 | 18 | 18 | #9,937 | #9,187 |
| 2019 | 5 | 5 | #16,878 | — |
| 2018 | 12 | 12 | #13,196 | #13,286 |
| 2016 | 7 | 7 | — | #10,276 |
| 2015 | 16 | 16 | #15,530 | #7,802 |
| 2014 | 7 | 7 | — | #10,249 |
| 2013 | 12 | 12 | — | #6,850 |
| 2012 | 12 | 12 | — | #6,857 |
| 2011 | 8 | 8 | — | #9,237 |
| 2010 | 18 | 18 | #16,063 | #6,921 |
| 2009 | 13 | 13 | — | #6,661 |
| 2008 | 5 | 5 | — | #13,695 |
| 2007 | 8 | 8 | — | #9,388 |
| 2006 | 12 | 12 | — | #6,708 |
| 2005 | 7 | 7 | — | #9,686 |
| 2003 | 8 | 8 | — | #8,280 |
| 2002 | 6 | 6 | — | #10,120 |
| 2001 | 5 | 5 | — | #11,582 |
| 2000 | 9 | 9 | — | #7,150 |
| 1997 | 5 | — | — | #10,128 |
| 1996 | 7 | — | — | #7,600 |
| 1994 | 5 | — | — | #9,631 |