Casidy
- Gender
- Girl
- Say it
- KAS-i-dee
- Origin
- Irish
Casidy is a girls' name of Irish origin. Too few babies were given it in the latest year to rank.
What does Casidy mean?
Irish: spelling of Cassidy; from the Irish surname Ó Caiside, perhaps meaning curly-haired
The Ó Caiside family were hereditary physicians to the Maguire chiefs of Fermanagh.
Meaning borrowed from Cassidy. More on Wiktionary.
Is Casidy a girl's or a boy's name?
Casidy is a girls' name.
How popular is Casidy in the US?
No girls in the US were given it in 2025, or too few to be listed. Its busiest year was 2001, with 26 girls. It first appears in the records in 1980.
Half of all the girls named Casidy in the US since 1880 were born between 1996 and 2006, the years shaded on the chart below.
Casidy in the US, year by year
| Year | Girls | Rank |
|---|---|---|
| 2016 | 7 | #12,871 |
| 2015 | 0 | – |
| 2014 | 5 | #16,507 |
| 2013 | 8 | #11,964 |
| 2012 | 10 | #10,424 |
| 2011 | 10 | #10,370 |
| 2010 | 12 | #9,227 |
| 2009 | 5 | #17,288 |
| 2008 | 12 | #9,472 |
| 2007 | 7 | #13,918 |
| 2006 | 11 | #9,897 |
| 2005 | 16 | #7,133 |
| 2004 | 12 | #8,711 |
| 2003 | 14 | #7,575 |
| 2002 | 22 | #5,250 |
| 2001 | 26 | #4,559 |
| 2000 | 20 | #5,486 |
| 1999 | 20 | #5,213 |
| 1998 | 10 | #8,579 |
| 1997 | 21 | #4,815 |
| 1996 | 16 | #5,766 |
| 1995 | 15 | #5,953 |
| 1994 | 13 | #6,666 |
| 1993 | 5 | #13,435 |
| 1992 | 8 | #9,483 |
| 1991 | 0 | – |
| 1990 | 8 | #9,241 |
| 1989 | 5 | #12,356 |
| 1988 | 6 | #10,381 |
| 1987 | 0 | – |
| 1986 | 7 | #8,518 |
| 1985 | 6 | #9,304 |
| 1984 | 0 | – |
| 1983 | 5 | #10,272 |
| 1982 | 0 | – |
| 1981 | 0 | – |
| 1980 | 5 | #10,390 |
Nicknames for Casidy
Names like Casidy
Names given in the same years and the same naming tradition, with a similar sound.
Cassidy Teagan Kennedy Keely Devyn Keegan Mckenna Keeley Kerrigan Brynn Codi Keiry
Names related to Casidy
More Irish names
Oscar Rowan Rory Maeve Finn Aiden Ryan Nolan Quinn Orla Cody Erin Ronan Connor Declan Casey
Sources
Figures from Popular Baby Names (US Social Security Administration). Nameling last updated them on 20 October 2026. How the figures are worked out, and the data to download.
To cite this page: Nameling, “Casidy: name meaning, origin and popularity”, https://www.nameling.co.uk/names/casidy, updated 20 October 2026.