Casidy is a rare variant of Cassidy that was most common in the 2000s and has all but disappeared.
Casidy is a girl name. It last appears in U.S. records in 2016. Casidy first appears in 1980 and peaked in 2001 (26 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2016 | 7 | 7 | #13,177 |
| 2014 | 5 | 5 | #17,081 |
| 2013 | 8 | 8 | #12,217 |
| 2012 | 10 | 10 | #10,596 |
| 2011 | 10 | 10 | #10,552 |
| 2010 | 12 | 12 | #9,350 |
| 2009 | 5 | 5 | #17,831 |
| 2008 | 12 | 12 | #9,600 |
| 2007 | 7 | 7 | #14,216 |
| 2006 | 11 | 11 | #10,046 |
| 2005 | 16 | 16 | #7,212 |
| 2004 | 12 | 12 | #8,827 |
| 2003 | 14 | 14 | #7,667 |
| 2002 | 22 | 22 | #5,290 |
| 2001 | 26 | 26 | #4,588 |
| 2000 | 20 | 20 | #5,529 |
| 1999 | 20 | 20 | #5,265 |
| 1998 | 10 | 10 | #8,693 |
| 1997 | 21 | — | #4,859 |
| 1996 | 16 | — | #5,828 |
| 1995 | 15 | — | #6,016 |
| 1994 | 13 | — | #6,742 |
| 1993 | 5 | — | #13,801 |
| 1992 | 8 | — | #9,626 |
| 1990 | 8 | — | #9,390 |
| 1989 | 5 | — | #12,690 |
| 1988 | 6 | — | #10,567 |
| 1986 | 7 | — | #8,660 |
| 1985 | 6 | — | #9,460 |
| 1983 | 5 | — | #10,499 |
| 1980 | 5 | — | #10,602 |