Kelby is an uncommon name used for both girls and boys that peaked in 1991 and has since faded.
Kelby is predominantly a boy name. In 2025 it ranked #5,313 among boys (18) and #7,682 among girls (14) — overall #7,653 across all names. The charts below show girls and boys separately.
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 32 | 32 | #7,682 | #5,313 |
| 2024 | 31 | 31 | #6,803 | #6,336 |
| 2023 | 29 | 29 | #10,754 | #4,982 |
| 2022 | 43 | 43 | #6,853 | #4,145 |
| 2021 | 35 | 35 | #9,253 | #4,312 |
| 2020 | 44 | 44 | #5,568 | #4,492 |
| 2019 | 39 | 39 | #6,082 | #5,057 |
| 2018 | 58 | 58 | #6,663 | #2,974 |
| 2017 | 42 | 42 | #8,549 | #3,725 |
| 2016 | 52 | 52 | #6,294 | #3,482 |
| 2015 | 65 | 65 | #5,752 | #2,833 |
| 2014 | 69 | 69 | #4,839 | #2,910 |
| 2013 | 71 | 71 | #5,575 | #2,578 |
| 2012 | 91 | 91 | #4,551 | #2,224 |
| 2011 | 83 | 83 | #4,414 | #2,490 |
| 2010 | 109 | 109 | #4,252 | #1,918 |
| 2009 | 82 | 82 | #5,013 | #2,423 |
| 2008 | 127 | 127 | #3,454 | #1,853 |
| 2007 | 123 | 123 | #3,508 | #1,885 |
| 2006 | 111 | 111 | #3,894 | #1,886 |
| 2005 | 120 | 120 | #3,619 | #1,703 |
| 2004 | 156 | 156 | #3,295 | #1,340 |
| 2003 | 161 | 161 | #2,934 | #1,293 |
| 2002 | 126 | 126 | #2,657 | #1,715 |
| 2001 | 167 | 167 | #2,584 | #1,237 |
| 2000 | 125 | 125 | #2,880 | #1,577 |
| 1999 | 177 | 177 | #2,451 | #1,123 |
| 1998 | 187 | 187 | #2,594 | #1,014 |
| 1997 | 175 | — | #2,145 | #1,137 |
| 1996 | 147 | — | #2,534 | #1,185 |
| 1995 | 196 | — | #2,296 | #947 |
| 1994 | 200 | — | #2,606 | #878 |
| 1993 | 221 | — | #1,995 | #863 |
| 1992 | 242 | — | #1,708 | #855 |
| 1991 | 277 | — | #1,665 | #746 |
| 1990 | 157 | — | #3,256 | #931 |
| 1989 | 137 | — | #4,582 | #943 |
| 1988 | 133 | — | #4,567 | #900 |
| 1987 | 110 | — | #3,915 | #1,014 |
| 1986 | 68 | — | #6,839 | #1,276 |
| 1985 | 62 | — | #6,690 | #1,339 |
| 1984 | 58 | — | #5,357 | #1,433 |
| 1983 | 50 | — | #8,470 | #1,456 |
| 1982 | 32 | — | — | #1,795 |
| 1981 | 48 | — | #7,056 | #1,566 |
| 1980 | 54 | — | #11,158 | #1,350 |
| 1979 | 50 | — | #9,514 | #1,412 |
| 1978 | 37 | — | — | #1,551 |
| 1977 | 55 | — | #7,927 | #1,301 |
| 1976 | 55 | — | #7,664 | #1,273 |
| 1975 | 46 | — | — | #1,270 |
| 1974 | 53 | — | #7,230 | #1,235 |
| 1973 | 56 | — | — | #1,085 |
| 1972 | 57 | — | — | #1,076 |
| 1971 | 48 | — | — | #1,190 |
| 1970 | 44 | — | — | #1,255 |
| 1969 | 23 | — | — | #1,751 |
| 1968 | 23 | — | — | #1,664 |
| 1967 | 14 | — | — | #2,208 |
| 1966 | 7 | — | — | #3,383 |
| 1964 | 7 | — | — | #3,454 |
| 1961 | 5 | — | — | #4,372 |
| 1960 | 7 | — | — | #3,497 |
| 1959 | 6 | — | — | #3,810 |
| 1958 | 9 | — | — | #2,930 |
| 1957 | 10 | — | — | #2,739 |
| 1954 | 6 | — | — | #3,634 |
| 1953 | 11 | — | — | #2,459 |
| 1952 | 6 | — | — | #3,560 |
| 1951 | 7 | — | — | #3,215 |
| 1950 | 8 | — | — | #2,902 |
| 1949 | 5 | — | — | #3,974 |
| 1948 | 5 | — | — | #3,943 |