Casidy
Casidy was last recorded in 2016, when 7 babies were given it; 347 Americans have been recorded with it between 1980 and 2016 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Casidy by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Casidy?
Unranked in 2025
Its last girls’ rank on record is #13,172, in 2016; SSA lists a name only in years with 5 or more births.
26 babies in 2001, the peak
Casidy peaked in 2001, when 26 girls were given it, #4,583 among girls’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2016 | 7 | #13,172 | 4.0 |
| 2014 | 5 | #17,075 | 2.8 |
| 2013 | 8 | #12,212 | 4.6 |
| 2012 | 10 | #10,590 | 5.7 |
| 2011 | 10 | #10,547 | 5.7 |
| 2010 | 12 | #9,346 | 6.8 |
| 2009 | 5 | #17,825 | 2.7 |
| 2008 | 12 | #9,596 | 6.3 |
| 2007 | 7 | #14,210 | 3.6 |
| 2006 | 11 | #10,041 | 5.8 |
Every recorded year (31)
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2005 | 16 | #7,207 | 8.7 |
| 2004 | 12 | #8,822 | 6.5 |
| 2003 | 14 | #7,662 | 7.7 |
| 2002 | 22 | #5,286 | 12.2 |
| 2001 | 26 | #4,583 | 14.4 |
| 2000 | 20 | #5,524 | 11.0 |
| 1999 | 20 | #5,259 | 11.3 |
| 1998 | 10 | #8,687 | 5.7 |
| 1997 | 21 | #4,855 | 12.1 |
| 1996 | 16 | #5,823 | 9.1 |
| 1995 | 15 | #6,011 | 8.5 |
| 1994 | 13 | #6,736 | 7.3 |
| 1993 | 5 | #13,795 | 2.8 |
| 1992 | 8 | #9,619 | 4.3 |
| 1990 | 8 | #9,384 | 4.2 |
| 1989 | 5 | #12,684 | 2.7 |
| 1988 | 6 | #10,562 | 3.4 |
| 1986 | 7 | #8,655 | 4.1 |
| 1985 | 6 | #9,457 | 3.5 |
| 1983 | 5 | #10,496 | 3.0 |
| 1980 | 5 | #10,600 | 3.0 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Casidy a boy’s or a girl’s name?
Casidy has been recorded only for girls: SSA lists no boys with the name in 31 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Casidy: the SSA national file counts each sex separately.
How many people are named Casidy, and how old are they?
An estimated 342 Americans named Casidy and born in the U.S. are alive in 2026 (99% of everyone recorded); the median is 25 years old and half are between 20 and 30. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 465 people named Casidy (426 women and girls, 39 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 343 born in the U.S. The Census count is 36% above that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
How common is the spelling Casidy?
Casidy is a less common spelling of Cassidy: SSA has recorded 347 Casidy and 64,583 Cassidy since 1880.
Of these 8 names spelled alike, given to 89,460 babies since 1880, Casidy is the sixth most given (<1% of them). In 2025 none of their 861 babies recorded by SSA was a Casidy (SSA lists a name only with 5 or more babies of one sex).
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Casidy
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Casidy and names like it
- Compare Casidy and CassidyBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2000sCasidy peaked in 2001.
- The top names of 2001The year the most babies were named Casidy.
- The names of Generation ZMost people named Casidy alive today were born 1997-2012.
- Names starting with CMost given first.