Kasyn is a rare variant of Kayson that peaked in 2020 and remains in steady use.
Kasyn is predominantly a boy name. In 2025 it ranked #1,799 among boys (89) and #16,082 among girls (5) — overall #3,709 across all names. The charts below show girls and boys separately.
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 94 | 94 | #16,082 | #1,799 |
| 2024 | 79 | 79 | #14,342 | #2,069 |
| 2023 | 89 | 89 | #14,283 | #1,903 |
| 2022 | 97 | 97 | #10,055 | #1,846 |
| 2021 | 100 | 100 | #8,719 | #1,796 |
| 2020 | 114 | 114 | #9,234 | #1,586 |
| 2019 | 99 | 99 | #10,902 | #1,747 |
| 2018 | 100 | 100 | #6,385 | #1,862 |
| 2017 | 99 | 99 | #6,671 | #1,835 |
| 2016 | 101 | 101 | #7,421 | #1,796 |
| 2015 | 89 | 89 | #6,587 | #2,045 |
| 2014 | 100 | 100 | #6,582 | #1,835 |
| 2013 | 80 | 80 | #9,317 | #2,011 |
| 2012 | 76 | 76 | #9,403 | #2,115 |
| 2011 | 76 | 76 | #7,988 | #2,158 |
| 2010 | 72 | 72 | #7,709 | #2,303 |
| 2009 | 58 | 58 | #9,138 | #2,730 |
| 2008 | 52 | 52 | #9,240 | #3,042 |
| 2007 | 37 | 37 | #13,283 | #3,648 |
| 2006 | 20 | 20 | #18,587 | #5,671 |
| 2005 | 9 | 9 | — | #7,998 |
| 2004 | 15 | 15 | #15,079 | #7,878 |
| 2003 | 7 | 7 | — | #9,168 |