Is Colby a boy or girl name?
Colby is mostly a boy name in the US. In 2024, 49 girls and 489 boys were named Colby, so 9.1% were girls. Across 1880–2024, 7.2% of the 57,635 US babies named Colby were girls.
- Boy rank, 2024
- #582
- Girl rank, 2024
- #3,225
- Babies named Colby since 1888
- 57,635
- Most popular year
- 2001
- 3,979 babies
Boys and girls named Colby, by decade
| Decade | Boys | Girls | Share girls |
|---|---|---|---|
| 1880s | 5 | 0 | 0% |
| 1890s | 0 | 0 | – |
| 1900s | 0 | 0 | – |
| 1910s | 32 | 0 | 0% |
| 1920s | 90 | 0 | 0% |
| 1930s | 73 | 0 | 0% |
| 1940s | 137 | 0 | 0% |
| 1950s | 225 | 65 | 22.4% |
| 1960s | 431 | 46 | 9.6% |
| 1970s | 2,754 | 303 | 9.9% |
| 1980s | 6,844 | 906 | 11.7% |
| 1990s | 14,261 | 1,210 | 7.8% |
| 2000s | 19,182 | 858 | 4.3% |
| 2010s | 7,195 | 475 | 6.2% |
| 2020s | 2,283 | 260 | 10.2% |
Every year
| Year | Boys | Boy rank | Girls | Girl rank |
|---|---|---|---|---|
| 2024 | 489 | #582 | 49 | #3,225 |
| 2023 | 467 | #606 | 47 | #3,391 |
| 2022 | 468 | #601 | 64 | #2,703 |
| 2021 | 420 | #651 | 55 | #3,010 |
| 2020 | 439 | #618 | 45 | #3,407 |
| 2019 | 447 | #611 | 48 | #3,288 |
| 2018 | 459 | #597 | 42 | #3,625 |
| 2017 | 465 | #584 | 47 | #3,351 |
| 2016 | 556 | #530 | 37 | #4,010 |
| 2015 | 665 | #457 | 45 | #3,492 |
| 2014 | 717 | #427 | 52 | #3,144 |
| 2013 | 745 | #400 | 33 | #4,351 |
| 2012 | 908 | #341 | 48 | #3,378 |
| 2011 | 1,026 | #314 | 57 | #2,996 |
| 2010 | 1,207 | #280 | 66 | #2,701 |
| 2009 | 1,152 | #285 | 72 | #2,575 |
| 2008 | 1,256 | #273 | 70 | #2,638 |
| 2007 | 1,221 | #283 | 68 | #2,687 |
| 2006 | 1,272 | #272 | 44 | #3,573 |
| 2005 | 1,603 | #220 | 54 | #2,975 |
| 2004 | 2,066 | #185 | 71 | #2,402 |
| 2003 | 2,170 | #181 | 85 | #2,086 |
| 2002 | 3,118 | #125 | 119 | #1,565 |
| 2001 | 3,859 | #99 | 120 | #1,547 |
| 2000 | 1,465 | #234 | 155 | #1,262 |
| 1999 | 1,507 | #224 | 138 | #1,311 |
| 1998 | 1,456 | #220 | 88 | #1,776 |
| 1997 | 1,357 | #229 | 90 | #1,721 |
| 1996 | 1,344 | #225 | 102 | #1,552 |
| 1995 | 1,411 | #209 | 108 | #1,476 |
| 1994 | 1,449 | #200 | 142 | #1,230 |
| 1993 | 1,519 | #200 | 134 | #1,274 |
| 1992 | 1,574 | #197 | 155 | #1,139 |
| 1991 | 1,515 | #202 | 124 | #1,328 |
| 1990 | 1,129 | #245 | 129 | #1,266 |
| 1989 | 1,032 | #250 | 105 | #1,415 |
| 1988 | 922 | #255 | 103 | #1,376 |
| 1987 | 870 | #257 | 138 | #1,098 |
| 1986 | 892 | #253 | 124 | #1,149 |
| 1985 | 715 | #286 | 146 | #1,031 |
| 1984 | 759 | #276 | 129 | #1,083 |
| 1983 | 656 | #300 | 82 | #1,428 |
| 1982 | 494 | #360 | 31 | #2,908 |
| 1981 | 242 | #539 | 17 | #4,378 |
| 1980 | 262 | #533 | 31 | #2,880 |
| 1979 | 298 | #478 | 29 | #2,941 |
| 1978 | 289 | #479 | 25 | #3,118 |
| 1977 | 298 | #467 | 41 | #2,223 |
| 1976 | 320 | #432 | 41 | #2,102 |
| 1975 | 350 | #413 | 42 | #2,065 |
| 1974 | 330 | #436 | 40 | #2,074 |
| 1973 | 309 | #445 | 26 | #2,697 |
| 1972 | 209 | #551 | 21 | #3,078 |
| 1971 | 209 | #560 | 19 | #3,389 |
| 1970 | 142 | #696 | 19 | #3,326 |
| 1969 | 84 | #838 | 12 | #4,227 |
| 1968 | 74 | #845 | 10 | #4,542 |
| 1967 | 42 | #1,152 | 0 | – |
| 1966 | 38 | #1,219 | 0 | – |
| 1965 | 32 | #1,362 | 6 | #5,932 |
| 1964 | 29 | #1,466 | 6 | #6,130 |
| 1963 | 33 | #1,355 | 6 | #6,006 |
| 1962 | 26 | #1,551 | 6 | #5,976 |
| 1961 | 40 | #1,254 | 0 | – |
| 1960 | 33 | #1,385 | 0 | – |
| 1959 | 29 | #1,470 | 5 | #6,422 |
| 1958 | 22 | #1,689 | 5 | #6,260 |
| 1957 | 31 | #1,414 | 5 | #6,237 |
| 1956 | 28 | #1,485 | 5 | #6,111 |
| 1955 | 25 | #1,546 | 14 | #3,117 |
| 1954 | 19 | #1,773 | 6 | #5,249 |
| 1953 | 17 | #1,910 | 9 | #3,997 |
| 1952 | 26 | #1,490 | 9 | #3,857 |
| 1951 | 14 | #2,068 | 0 | – |
| 1950 | 14 | #2,041 | 7 | #4,390 |
| 1949 | 24 | #1,515 | 0 | – |
| 1948 | 25 | #1,465 | 0 | – |
| 1947 | 17 | #1,863 | 0 | – |
| 1946 | 8 | #2,740 | 0 | – |
| 1945 | 15 | #1,791 | 0 | – |
| 1944 | 16 | #1,753 | 0 | – |
| 1943 | 10 | #2,435 | 0 | – |
| 1942 | 9 | #2,560 | 0 | – |
| 1941 | 7 | #2,921 | 0 | – |
| 1940 | 6 | #3,192 | 0 | – |
| 1939 | 9 | #2,486 | 0 | – |
| 1938 | 10 | #2,358 | 0 | – |
| 1937 | 7 | #2,959 | 0 | – |
| 1936 | 7 | #2,920 | 0 | – |
| 1935 | 10 | #2,418 | 0 | – |
| 1934 | 6 | #3,356 | 0 | – |
| 1933 | 6 | #3,338 | 0 | – |
| 1932 | 5 | #3,873 | 0 | – |
| 1931 | 5 | #3,872 | 0 | – |
| 1930 | 8 | #3,070 | 0 | – |
| 1929 | 5 | #4,069 | 0 | – |
| 1928 | 9 | #2,889 | 0 | – |
| 1927 | 10 | #2,734 | 0 | – |
| 1926 | 8 | #3,186 | 0 | – |
| 1925 | 8 | #3,197 | 0 | – |
| 1924 | 9 | #3,067 | 0 | – |
| 1923 | 7 | #3,528 | 0 | – |
| 1922 | 8 | #3,306 | 0 | – |
| 1921 | 13 | #2,405 | 0 | – |
| 1920 | 13 | #2,357 | 0 | – |
| 1919 | 8 | #3,166 | 0 | – |
| 1918 | 7 | #3,437 | 0 | – |
| 1917 | 9 | #2,777 | 0 | – |
| 1916 | 8 | #2,968 | 0 | – |
| 1915 | 0 | – | 0 | – |
| 1914 | 0 | – | 0 | – |
| 1913 | 0 | – | 0 | – |
| 1912 | 0 | – | 0 | – |
| 1911 | 0 | – | 0 | – |
| 1910 | 0 | – | 0 | – |
| 1909 | 0 | – | 0 | – |
| 1908 | 0 | – | 0 | – |
| 1907 | 0 | – | 0 | – |
| 1906 | 0 | – | 0 | – |
| 1905 | 0 | – | 0 | – |
| 1904 | 0 | – | 0 | – |
| 1903 | 0 | – | 0 | – |
| 1902 | 0 | – | 0 | – |
| 1901 | 0 | – | 0 | – |
| 1900 | 0 | – | 0 | – |
| 1899 | 0 | – | 0 | – |
| 1898 | 0 | – | 0 | – |
| 1897 | 0 | – | 0 | – |
| 1896 | 0 | – | 0 | – |
| 1895 | 0 | – | 0 | – |
| 1894 | 0 | – | 0 | – |
| 1893 | 0 | – | 0 | – |
| 1892 | 0 | – | 0 | – |
| 1891 | 0 | – | 0 | – |
| 1890 | 0 | – | 0 | – |
| 1889 | 0 | – | 0 | – |
| 1888 | 5 | #1,067 | 0 | – |
Highest rank
As a boy name, Colby reached #99 in 2001. As a girl name, it reached #1,031 in 1985. Ranks count every name SSA published for that year and sex, so they go well past the top 1,000.
Names from the same era
These names were also most popular in the 2000s, with a similar number of babies. They can work as sibling or middle names that feel like they belong together.
Names spelled like Colby
Source: US Social Security Administration baby name data, 1880–2024. Counts are Social Security card applications for US births; SSA leaves out names given to fewer than 5 babies in a year. Updated 2026-10-05. How these numbers are made.