Kilyn is a very rare name used for both girls and boys that peaked in 2009 and has since faded.
Kilyn is predominantly a girl name. In 2025 it ranked #16,180 for girl births in the United States (and #26,842 across all names), given to 5 babies. Kilyn first appears in 2001 and peaked in 2009 (11 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 5 | 5 | #16,180 | — |
| 2022 | 10 | 10 | #16,576 | #13,444 |
| 2020 | 12 | 12 | #12,849 | #13,190 |
| 2019 | 6 | 6 | #14,743 | — |
| 2018 | 8 | 8 | #11,990 | — |
| 2017 | 15 | 15 | #11,179 | #11,547 |
| 2016 | 10 | 10 | #10,498 | — |
| 2015 | 6 | 6 | — | #11,480 |
| 2014 | 14 | 14 | #11,485 | #13,163 |
| 2013 | 7 | 7 | #13,942 | — |
| 2012 | 9 | 9 | #11,786 | — |
| 2011 | 7 | 7 | #14,102 | — |
| 2010 | 10 | 10 | #10,849 | — |
| 2009 | 17 | 17 | #10,343 | #11,804 |
| 2008 | 9 | 9 | #12,130 | — |
| 2007 | 8 | 8 | #13,329 | — |
| 2006 | 8 | 8 | #13,017 | — |
| 2005 | 7 | 7 | #13,778 | — |
| 2004 | 9 | 9 | #11,200 | — |
| 2003 | 7 | 7 | #13,180 | — |
| 2002 | 6 | 6 | #14,566 | — |
| 2001 | 6 | 6 | #14,480 | — |