Cai is a rare name used for both girls and boys that peaked in 2022 and remains in steady use.
Cai is predominantly a boy name. In 2025 it ranked #2,113 among boys (69) and #8,457 among girls (12) — overall #4,086 across all names. The charts below show girls and boys separately.
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 81 | 81 | #8,457 | #2,113 |
| 2024 | 101 | 101 | #6,445 | #1,905 |
| 2023 | 111 | 111 | #5,155 | #1,852 |
| 2022 | 131 | 131 | #5,496 | #1,612 |
| 2021 | 111 | 111 | #5,263 | #1,803 |
| 2020 | 104 | 104 | #3,789 | #2,118 |
| 2019 | 94 | 94 | #4,791 | #2,152 |
| 2018 | 86 | 86 | #5,821 | #2,149 |
| 2017 | 93 | 93 | #5,211 | #2,052 |
| 2016 | 116 | 116 | #4,271 | #1,830 |
| 2015 | 107 | 107 | #5,322 | #1,816 |
| 2014 | 92 | 92 | #6,026 | #2,003 |
| 2013 | 76 | 76 | #6,057 | #2,305 |
| 2012 | 77 | 77 | #5,744 | #2,361 |
| 2011 | 66 | 66 | #5,091 | #2,954 |
| 2010 | 47 | 47 | #11,434 | #3,023 |
| 2009 | 57 | 57 | #7,746 | #2,904 |
| 2008 | 54 | 54 | #8,194 | #3,008 |
| 2007 | 39 | 39 | #10,966 | #3,609 |
| 2006 | 33 | 33 | #10,734 | #4,118 |
| 2005 | 41 | 41 | #8,998 | #3,396 |
| 2004 | 41 | 41 | #7,905 | #3,464 |
| 2003 | 33 | 33 | #11,498 | #3,546 |
| 2002 | 29 | 29 | #10,379 | #4,061 |
| 2001 | 22 | 22 | #15,767 | #4,506 |
| 2000 | 23 | 23 | #12,005 | #4,610 |
| 1999 | 6 | 6 | — | #8,849 |
| 1998 | 8 | 8 | — | #6,937 |
| 1997 | 16 | — | #9,142 | #7,386 |
| 1996 | 12 | — | #12,075 | #8,088 |
| 1995 | 6 | — | — | #7,928 |
| 1994 | 8 | — | — | #6,447 |
| 1993 | 9 | — | — | #5,822 |
| 1990 | 10 | — | — | #5,037 |
| 1989 | 5 | — | — | #8,059 |