Cassidy
The girl's name Cassidy has been in the national records since 1968, with 64,583 births to its name. In 2025 it ranked 541st. About 64,000 Cassidys are alive in the United States today, and half of them are over 24.
Popularity, 1880–2025
girls named Cassidy boys named Cassidy
Girls and boys called Cassidy
years more girls than boys years more boys than girls
Cassidy crossed from boys to girls in 1975, and has stayed there for 51 of the years counted since. At its furthest it was 99% girls, and in 2025 it was 92%.
The girls’ share of each year’s babies of the name, in the 56 years in which at least 25 babies got it. The line touches the middle more often than there are crossings marked: a year or two on the other side is not a name changing hands, and only a move that holds for 5 counted years and reaches 60/40 is recorded as one. All 581 names that changed sex.
By the numbers
- Total US births
- 64,583
- Estimated living today
- 64,000
- Median age today
- 24
- Peak year
- 1999
- Best rank
- 99th
- Rank in 2025
- 541st
- First recorded
- 1968
- Girls / boys
- 60,848 / 3,735
How old the living Cassidys are
born that year still alive today
Of the 64,583 babies given the name since 1968, about 64,000 are alive — 99 in every hundred. Roughly 19,000 of them are children and 0 are 65 or over. The dotted line is the median: half were born before 2001 and half after.
An estimate, not a count. SSA births aged forward through SSA cohort life tables, which know nothing about who left the country or arrived in it — so for a name that mostly came to America rather than being born in it, this is a floor rather than a figure. Where you fall among living Americans.
Where the name comes from
Origin a surname
From the Irish surname, Anglicized from Ó Caiside (“descendant of Caiside”), from cas (“curly-haired”).
Etymology from Wiktionary, used under CC BY-SA 4.0.
Notable Cassidys
- Cassidy Freeman (born 1982)American actress and singer
- Cassidy (born 1982)American rapper from Philadelphia
- Cassidy Hutchinson (born 1996)American political staffer
- Cassidy Rae (born 1976)American actress
People named Cassidy with articles in the most Wikipedia languages. Data from Wikidata (CC0).
Where Cassidy is most common
Relative to how many babies each state records, Cassidy is most concentrated in Utah (2.4×), Nevada (2.1×), Colorado (1.8×), Alaska (1.6×).
Total births recorded in each state since 1910. Browse names by state.
Names of 1999
The most popular girls’ names the year Cassidy peaked:
Cassidy elsewhere
| Country | Spelling | Births | Best rank |
|---|---|---|---|
| England and Wales girls | Cassidy | 1,467 | 586th |
| France girls | Cassidy | 1,300 | 701st |
| England and Wales boys | Cassidy | 289 | 1,230th |
| Scotland girls | Cassidy | 141 | 338th |
| Ireland girls | Cassidy | 49 | 641st |
| France boys | Cassidy | 40 | 6,341st |
| Belgium girls | Cassidy | 32 | 728th |
| Northern Ireland girls | Cassidy | 22 | 370th |
Counts come from each country's own records and are not comparable with the US figures above, which cover different years and a different definition of a recorded name. Where a country writes the name several ways, the spellings are added together and the most common is shown. A row marked name registrations is counting something else: Portugal ranks each of a child's two given names separately, so a girl registered Maria Leonor is in both the Maria row and the Leonor row, and that figure is not a number of children.
Cassidy: rank by region
In 2002, Cassidy was given 5 times or more in 1 region of Belgium.
| Region | Spelling | Place | Children |
|---|---|---|---|
| Wallonia | Cassidy | 345 | 7 |
Each of these is the top of a list the statistics office cut off somewhere – Belgium below 5 children – and published nothing after. So a region missing here is one where the name fell outside what was published, not one where it went unused. Places are shared where names tie, and the further down a list a place is, the more names can share it.
Related names
Cassidy against another name
Two names on one chart, with the year one overtook the other.
Try it on yourself
Source: US Social Security Administration, national and state baby-name files, 1880–2025. Counts include only births registered with the SSA, and names with fewer than five births in a year are not published. The living estimate applies SSA cohort life tables to those births; it counts people born in the United States, so it misses anyone who arrived later and anyone who has left.