Colbey is a rare variant of Colby that was most common in the 2000s and has all but disappeared.
Colbey is predominantly a boy name. It last appears in U.S. records in 2016. Colbey first appears in 1983 and peaked in 2002 (39 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2016 | 6 | 6 | — | #10,991 |
| 2015 | 5 | 5 | — | #12,436 |
| 2014 | 6 | 6 | — | #10,988 |
| 2013 | 9 | 9 | — | #8,242 |
| 2012 | 7 | 7 | — | #9,907 |
| 2011 | 14 | 14 | — | #5,997 |
| 2010 | 15 | 15 | — | #5,791 |
| 2009 | 12 | 12 | — | #6,881 |
| 2008 | 15 | 15 | — | #5,816 |
| 2007 | 17 | 17 | #18,241 | #6,700 |
| 2006 | 16 | 16 | — | #5,345 |
| 2005 | 20 | 20 | — | #4,349 |
| 2004 | 14 | 14 | — | #5,547 |
| 2003 | 22 | 22 | — | #3,857 |
| 2002 | 39 | 39 | — | #2,514 |
| 2001 | 33 | 33 | — | #2,816 |
| 2000 | 20 | 20 | — | #3,937 |
| 1999 | 23 | 23 | — | #3,391 |
| 1998 | 27 | 27 | — | #2,939 |
| 1997 | 26 | — | — | #2,916 |
| 1996 | 33 | — | #13,967 | #2,692 |
| 1995 | 27 | — | — | #2,698 |
| 1994 | 13 | — | — | #4,578 |
| 1993 | 24 | — | #9,750 | #3,849 |
| 1992 | 24 | — | #13,732 | #3,357 |
| 1991 | 16 | — | — | #3,671 |
| 1990 | 16 | — | — | #3,631 |
| 1989 | 12 | — | — | #4,318 |
| 1988 | 9 | — | — | #4,854 |
| 1986 | 5 | — | #11,290 | — |
| 1985 | 9 | — | — | #4,388 |
| 1984 | 9 | — | — | #4,267 |
| 1983 | 8 | — | — | #4,584 |