Caio is a rare boys' name that has climbed to its highest level yet, peaking in 2023.
Caio is a boy name. In 2025 it ranked #3,322 for boy births in the United States (and #7,139 across all names), given to 35 babies. Caio first appears in 1990 and peaked in 2023 (40 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 35 | 35 | #3,322 |
| 2024 | 30 | 30 | #3,708 |
| 2023 | 40 | 40 | #3,067 |
| 2022 | 29 | 29 | #3,787 |
| 2021 | 32 | 32 | #3,510 |
| 2020 | 24 | 24 | #4,160 |
| 2019 | 34 | 34 | #3,359 |
| 2018 | 32 | 32 | #3,457 |
| 2017 | 24 | 24 | #4,242 |
| 2016 | 11 | 11 | #7,216 |
| 2015 | 23 | 23 | #4,311 |
| 2014 | 21 | 21 | #4,557 |
| 2013 | 29 | 29 | #3,592 |
| 2012 | 25 | 25 | #4,025 |
| 2011 | 21 | 21 | #4,530 |
| 2010 | 30 | 30 | #3,545 |
| 2009 | 31 | 31 | #3,485 |
| 2008 | 31 | 31 | #3,497 |
| 2007 | 32 | 32 | #3,385 |
| 2006 | 28 | 28 | #3,613 |
| 2005 | 23 | 23 | #3,957 |
| 2004 | 16 | 16 | #5,046 |
| 2003 | 15 | 15 | #5,071 |
| 2002 | 16 | 16 | #4,732 |
| 2001 | 6 | 6 | #9,430 |
| 2000 | 11 | 11 | #5,968 |
| 1999 | 12 | 12 | #5,355 |
| 1998 | 7 | 7 | #7,671 |
| 1997 | 5 | — | #9,466 |
| 1996 | 7 | — | #7,242 |
| 1995 | 11 | — | #5,170 |
| 1994 | 6 | — | #7,901 |
| 1993 | 8 | — | #6,291 |
| 1992 | 6 | — | #7,541 |
| 1991 | 5 | — | #8,366 |
| 1990 | 6 | — | #7,298 |