Cassian is an uncommon boys' name that has climbed to its highest level yet, peaking in 2025.
Cassian is predominantly a boy name. In 2025 it ranked #479 for boy births in the United States (and #968 across all names), given to 633 babies. Cassian first appears in 1997 and peaked in 2025 (633 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 633 | 633 | — | #479 |
| 2024 | 464 | 464 | — | #617 |
| 2023 | 566 | 566 | #10,484 | #529 |
| 2022 | 244 | 244 | — | #938 |
| 2021 | 230 | 230 | — | #969 |
| 2020 | 196 | 196 | — | #1,036 |
| 2019 | 132 | 132 | — | #1,355 |
| 2018 | 136 | 136 | — | #1,328 |
| 2017 | 133 | 133 | #16,365 | #1,379 |
| 2016 | 19 | 19 | — | #4,979 |
| 2015 | 19 | 19 | — | #4,915 |
| 2014 | 19 | 19 | — | #4,908 |
| 2013 | 13 | 13 | — | #6,305 |
| 2012 | 22 | 22 | — | #4,416 |
| 2011 | 11 | 11 | — | #7,087 |
| 2010 | 14 | 14 | — | #6,091 |
| 2009 | 17 | 17 | — | #5,362 |
| 2008 | 13 | 13 | — | #6,455 |
| 2006 | 8 | 8 | — | #8,855 |
| 2004 | 8 | 8 | — | #8,256 |
| 2002 | 5 | 5 | — | #10,925 |
| 1997 | 5 | — | — | #9,482 |