Castin is a very rare boys' name that peaked in 2017 and has grown less common since.
Castin is a boy name. In 2025 it ranked #12,369 for boy births in the United States (and #25,495 across all names), given to 5 babies. Castin first appears in 2006 and peaked in 2017 (18 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 5 | 5 | #12,369 |
| 2024 | 10 | 10 | #7,870 |
| 2023 | 9 | 9 | #8,371 |
| 2022 | 11 | 11 | #7,348 |
| 2021 | 14 | 14 | #6,082 |
| 2020 | 9 | 9 | #8,191 |
| 2019 | 12 | 12 | #6,848 |
| 2018 | 11 | 11 | #7,212 |
| 2017 | 18 | 18 | #5,139 |
| 2016 | 8 | 8 | #8,988 |
| 2015 | 8 | 8 | #8,880 |
| 2014 | 11 | 11 | #7,151 |
| 2013 | 8 | 8 | #8,930 |
| 2012 | 9 | 9 | #8,267 |
| 2011 | 11 | 11 | #7,088 |
| 2010 | 7 | 7 | #9,860 |
| 2009 | 10 | 10 | #7,779 |
| 2007 | 5 | 5 | #12,665 |
| 2006 | 8 | 8 | #8,856 |