Kei is a rare name used for both girls and boys that peaked in 2015 and has grown less common since.
Kei is predominantly a boy name. In 2025 it ranked #6,284 for boy births in the United States (and #13,211 across all names), given to 14 babies. Kei was first reported in SSA data in 1920 and peaked in 2015 (33 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 14 | 14 | — | #6,284 |
| 2024 | 22 | 22 | — | #4,636 |
| 2023 | 33 | 33 | #12,804 | #4,168 |
| 2022 | 17 | 17 | — | #5,541 |
| 2021 | 15 | 15 | — | #5,906 |
| 2020 | 18 | 18 | — | #5,144 |
| 2019 | 27 | 27 | #16,785 | #4,563 |
| 2018 | 31 | 31 | #14,746 | #4,155 |
| 2017 | 25 | 25 | — | #4,180 |
| 2016 | 30 | 30 | — | #3,647 |
| 2015 | 40 | 40 | #13,743 | #3,402 |
| 2014 | 30 | 30 | #17,885 | #4,077 |
| 2013 | 19 | 19 | — | #4,894 |
| 2012 | 21 | 21 | #18,228 | #5,607 |
| 2011 | 18 | 18 | #14,070 | #7,266 |
| 2010 | 13 | 13 | #14,244 | #11,510 |
| 2009 | 14 | 14 | — | #6,282 |
| 2008 | 22 | 22 | #19,026 | #5,374 |
| 2007 | 13 | 13 | — | #6,457 |
| 2006 | 18 | 18 | #16,145 | #6,693 |
| 2005 | 12 | 12 | — | #6,431 |
| 2004 | 18 | 18 | — | #4,695 |
| 2003 | 13 | 13 | — | #5,725 |
| 2002 | 11 | 11 | — | #6,321 |
| 2001 | 22 | 22 | #11,522 | #5,287 |
| 2000 | 20 | 20 | #16,291 | #4,923 |
| 1999 | 15 | 15 | #12,000 | #7,525 |
| 1998 | 11 | 11 | — | #5,660 |
| 1997 | 18 | — | #14,891 | #4,815 |
| 1996 | 5 | — | — | #9,799 |
| 1995 | 10 | — | — | #5,718 |
| 1994 | 22 | — | #7,346 | #5,679 |
| 1993 | 11 | — | #12,583 | #9,484 |
| 1992 | 18 | — | #11,057 | #5,074 |
| 1991 | 21 | — | #12,240 | #3,924 |
| 1990 | 19 | — | #9,689 | #4,847 |
| 1989 | 15 | — | #11,530 | #5,393 |
| 1988 | 13 | — | #8,779 | #7,921 |
| 1987 | 12 | — | #10,504 | #6,549 |
| 1986 | 7 | — | — | #5,658 |
| 1985 | 15 | — | #7,916 | #5,464 |
| 1984 | 9 | — | — | #4,389 |
| 1983 | 5 | — | #11,057 | — |
| 1982 | 10 | — | — | #4,098 |
| 1981 | 8 | — | #7,734 | — |
| 1980 | 18 | — | #6,516 | #4,738 |
| 1979 | 15 | — | #9,510 | #4,237 |
| 1978 | 5 | — | #10,494 | — |
| 1977 | 6 | — | — | #5,497 |
| 1925 | 7 | — | — | #3,577 |
| 1920 | 6 | — | — | #4,052 |