The baby name Katilyn appears in baby name data for the United States from 1989 to 2015. It was most popular in 1998 with 75 babies given the name.
In the later years of this period, Katilyn has become less common than it once was.
| Year | Count |
|---|---|
| 1989 | 14 |
| 1990 | 11 |
| 1991 | 7 |
| 1992 | 5 |
| 1993 | 25 |
| 1994 | 51 |
| 1995 | 58 |
| 1996 | 11 |
| 1997 | 55 |
| 1998 | 75 |
| 1999 | 29 |
| 2000 | 33 |
| 2001 | 26 |
| 2002 | 36 |
| 2003 | 28 |
| 2004 | 32 |
| 2006 | 11 |
| 2007 | 6 |
| 2011 | 6 |
| 2013 | 12 |
| 2015 | 5 |