Kainoa is an uncommon boys' name that peaked in 2016 and remains in steady use.
Kainoa is predominantly a boy name. In 2025 it ranked #1,716 for boy births in the United States (and #3,670 across all names), given to 95 babies. Kainoa first appears in 1975 and peaked in 2016 (105 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 95 | 95 | — | #1,716 |
| 2024 | 104 | 104 | #16,407 | #1,692 |
| 2023 | 101 | 101 | — | #1,687 |
| 2022 | 75 | 75 | — | #2,031 |
| 2021 | 90 | 90 | #11,611 | #1,879 |
| 2020 | 80 | 80 | — | #1,858 |
| 2019 | 93 | 93 | — | #1,705 |
| 2018 | 86 | 86 | — | #1,784 |
| 2017 | 92 | 92 | — | #1,711 |
| 2016 | 105 | 105 | — | #1,568 |
| 2015 | 92 | 92 | — | #1,697 |
| 2014 | 88 | 88 | — | #1,721 |
| 2013 | 84 | 84 | — | #1,744 |
| 2012 | 84 | 84 | — | #1,778 |
| 2011 | 77 | 77 | — | #1,842 |
| 2010 | 76 | 76 | — | #1,892 |
| 2009 | 74 | 74 | — | #1,932 |
| 2008 | 84 | 84 | — | #1,782 |
| 2007 | 76 | 76 | — | #1,884 |
| 2006 | 80 | 80 | — | #1,749 |
| 2005 | 90 | 90 | — | #1,563 |
| 2004 | 79 | 79 | — | #1,640 |
| 2003 | 86 | 86 | #16,984 | #1,573 |
| 2002 | 67 | 67 | — | #1,731 |
| 2001 | 55 | 55 | — | #1,970 |
| 2000 | 62 | 62 | — | #1,772 |
| 1999 | 50 | 50 | — | #1,948 |
| 1998 | 41 | 41 | — | #2,221 |
| 1997 | 27 | — | — | #2,864 |
| 1996 | 47 | — | — | #1,922 |
| 1995 | 34 | — | — | #2,322 |
| 1994 | 40 | — | — | #2,062 |
| 1993 | 29 | — | — | #2,545 |
| 1992 | 30 | — | — | #2,438 |
| 1991 | 41 | — | #14,164 | #2,076 |
| 1990 | 18 | — | #13,970 | #4,283 |
| 1989 | 15 | — | — | #3,724 |
| 1988 | 19 | — | — | #2,910 |
| 1987 | 14 | — | — | #3,430 |
| 1986 | 13 | — | — | #3,545 |
| 1985 | 6 | — | — | #6,159 |
| 1984 | 21 | — | #9,656 | #3,032 |
| 1983 | 13 | — | — | #3,323 |
| 1981 | 12 | — | — | #3,509 |
| 1980 | 17 | — | #9,601 | #3,734 |
| 1979 | 9 | — | — | #4,231 |
| 1978 | 9 | — | — | #4,004 |
| 1977 | 10 | — | — | #3,726 |
| 1975 | 6 | — | — | #5,121 |