Kolbey is a very rare variant of Kolby that peaked in 2003 and has since faded.
Kolbey is predominantly a boy name. In 2025 it ranked #11,421 for boy births in the United States (and #23,516 across all names), given to 6 babies. Kolbey was first reported in SSA data in 1990 and peaked in 2009 (18 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 6 | 6 | — | #11,421 |
| 2017 | 6 | 6 | — | #11,560 |
| 2015 | 6 | 6 | — | #11,497 |
| 2014 | 5 | 5 | — | #13,179 |
| 2012 | 6 | 6 | — | #11,616 |
| 2011 | 17 | 17 | #18,293 | #6,833 |
| 2010 | 9 | 9 | — | #8,497 |
| 2009 | 18 | 18 | — | #5,218 |
| 2008 | 13 | 13 | — | #6,616 |
| 2007 | 6 | 6 | — | #11,742 |
| 2006 | 7 | 7 | — | #10,184 |
| 2005 | 8 | 8 | — | #8,756 |
| 2004 | 13 | 13 | — | #6,001 |
| 2003 | 20 | 20 | #17,145 | #5,170 |
| 2002 | 17 | 17 | — | #4,620 |
| 2001 | 16 | 16 | #16,727 | #6,259 |
| 2000 | 8 | 8 | — | #7,868 |
| 1999 | 13 | 13 | #12,062 | #9,379 |
| 1998 | 16 | 16 | — | #4,313 |
| 1997 | 5 | — | — | #10,126 |
| 1996 | 9 | — | — | #6,292 |
| 1995 | 7 | — | — | #7,438 |
| 1994 | 8 | — | — | #6,722 |
| 1993 | 6 | — | — | #8,209 |
| 1992 | 8 | — | — | #6,431 |
| 1991 | 7 | — | — | #6,948 |
| 1990 | 5 | — | — | #8,876 |