Castle is a rare boys' name that peaked in 2018 and has grown less common since.
Castle is a boy name. In 2025 it ranked #5,430 for boy births in the United States (and #11,448 across all names), given to 17 babies. Castle first appears in 1916 and peaked in 2018 (32 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 17 | 17 | #5,430 |
| 2024 | 25 | 25 | #4,218 |
| 2023 | 13 | 13 | #6,606 |
| 2022 | 17 | 17 | #5,474 |
| 2021 | 26 | 26 | #4,034 |
| 2020 | 24 | 24 | #4,163 |
| 2019 | 19 | 19 | #4,993 |
| 2018 | 32 | 32 | #3,460 |
| 2017 | 25 | 25 | #4,127 |
| 2016 | 15 | 15 | #5,829 |
| 2015 | 27 | 27 | #3,899 |
| 2014 | 16 | 16 | #5,519 |
| 2013 | 12 | 12 | #6,665 |
| 2012 | 19 | 19 | #4,893 |
| 2011 | 17 | 17 | #5,235 |
| 2010 | 15 | 15 | #5,784 |
| 2007 | 5 | 5 | #12,666 |
| 2006 | 5 | 5 | #12,336 |
| 2005 | 7 | 7 | #9,275 |
| 2003 | 6 | 6 | #9,772 |
| 2000 | 6 | 6 | #9,260 |
| 1999 | 5 | 5 | #10,137 |
| 1998 | 5 | 5 | #9,841 |
| 1964 | 5 | — | #4,132 |
| 1933 | 5 | — | #3,724 |
| 1920 | 7 | — | #3,536 |
| 1919 | 5 | — | #4,256 |
| 1916 | 5 | — | #3,998 |