The baby name Katlyn appears in baby name data for the United States from 1982 to 2019. It was most popular in 1998 with 1,598 babies given the name.
In the later years of this period, Katlyn has become less common than it once was.
| Year | Count |
|---|---|
| 1982 | 11 |
| 1983 | 8 |
| 1984 | 43 |
| 1985 | 101 |
| 1986 | 166 |
| 1987 | 266 |
| 1988 | 617 |
| 1989 | 719 |
| 1990 | 937 |
| 1991 | 1,179 |
| 1992 | 1,120 |
| 1993 | 1,334 |
| 1994 | 1,428 |
| 1995 | 1,566 |
| 1996 | 1,440 |
| 1997 | 1,552 |
| 1998 | 1,598 |
| 1999 | 1,248 |
| 2000 | 1,043 |
| 2001 | 952 |
| 2002 | 709 |
| 2003 | 625 |
| 2004 | 693 |
| 2005 | 625 |
| 2006 | 461 |
| 2007 | 323 |
| 2008 | 251 |
| 2009 | 181 |
| 2010 | 151 |
| 2011 | 59 |
| 2012 | 45 |
| 2013 | 5 |
| 2014 | 19 |
| 2015 | 12 |
| 2019 | 11 |