Kassidy
Kassidy was the 1039th most popular name for girls in 2025, given to 240 babies. Its best year was 2000, when it ranked 314th with 1,007 babies. Over the last ten years it has moved down 574 places. More babies were named Kassidy in the 2000s than in any other decade.
Meaning (as Cassidy) curly-haired (Irish Ó Caiside) · Irish
- Rank in 2025
- #1,039 girls, down 388 places since 2020
- Babies in 2025
- 240girls
- Girls and boys
- Almost always a girl’s name2021–2025
- Peak year
- 20001,007 babies
- Total since 1880
- 21,715babies recorded
What does the name Kassidy mean?
Kassidy is a spelling of Cassidy, pronounced the same way, so it shares Cassidy's meaning and origin.
Cassidy is an Irish surname from Ó Caiside, "descendant of Caiside", a byname which Wiktionary derives from cas, "curly", so "curly-haired". Woulfe's 1923 index lists Cassidy and Cassedy among the English forms. As a first name it is used for boys and, since the 1980s in the US, mostly for girls.
Ó Caiside (Irish, “descendant of Caiside”)cas (Irish, “curly”)
How sure is this? Probable. The 'curly' reading is given by Wiktionary; it needs an Irish dictionary check.
Related names: Cassie, Cass, Kassidy.
See also: Irish names.
Sources for this meaning
- Wiktionary, entry 'Cassidy', Wiktionary (Wikimedia Foundation)
- Patrick Woulfe, Sloinnte Gaedheal is Gall: Irish Names and Surnames (1923), index of Irish surnames and their anglicized forms, M. H. Gill & Son (Internet Archive scan)
Kassidy popularity since 1880
A few boys are given the name too: 433 since 1982, 7 in 2025.
| Year | Rank (girls) | Babies (girls) |
|---|---|---|
| 2025 | #1,039 | 240 |
| 2020 | #651 | 443 |
| 2010 | #461 | 670 |
| 2000 | #314 | 1,007 |
| 1990 | #1,679 | 88 |
| 1980 | #3,557 | 23 |
| 1970 | — | — |
| 1960 | — | — |
| 1950 | — | — |
| 1940 | — | — |
| 1930 | — | — |
| 1920 | — | — |
| 1910 | — | — |
| 1900 | — | — |
| 1890 | — | — |
| 1880 | — | — |
How popular is Kassidy, counting every spelling?
Kassidy is a spelling of Cassidy, a name family that ranked #400 for girls in 2025 once every spelling is counted together, compared with #1,039 for Kassidy on its own. Together these spellings went to 824 girls in 2025.
| Spelling | Babies 2025 | Official rank | Babies 2021–2025 |
|---|---|---|---|
| Cassidy | 558 | #541 | 3,140 |
| Kassidy | 240 | #1,039 | 1,536 |
| Kassidi | 15 | #7,310 | 99 |
| Cassidee | 6 | #13,534 | 30 |
Spellings count together when they sound the same in American English and are used for the same sex; nicknames and forms that sound different (such as Theo and Theodore) are kept apart. How we group spellings.
How many kids will share the name Kassidy?
240 of the 3,606,400 babies born in the US in 2025 were named Kassidy (0.07 per 1,000 births). For a girl named Kassidy born in 2025, the chance that another child with the same name is in a class of 20 children the same age is under 1 in 50. If every grade liked the name as much as the 2025 babies do, only about one elementary school in 35 (of 430 pupils) would have a child named Kassidy.
Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.
How old are people named Kassidy?
About 21,000 people born in the US named Kassidy are alive today, with a median age of 20; half are between 12 and 26. That makes Kassidy mostly worn by children and young adults.
Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.
Kassidy by state
How common Kassidy was among girls born in each state in 2021–2025. It is notably more common than nationally in Mississippi (2.7×), South Carolina (2.2×), Louisiana (2.1×), Michigan (2.0×), Virginia (2.0×). In 22 states fewer than five girls a year got the name, too few for SSA to publish, so those states show as zero.
Names with a similar history
These names rose and fell in step with Kassidy: their share of US girls followed the most similar curve since 1880. If you like Kassidy, they share its era and feel.
Questions about the name Kassidy
What does Kassidy mean?
Kassidy is a spelling of Cassidy, which means “curly-haired (Irish Ó Caiside)” (Irish origin). Certainty: probable.
How popular is the name Kassidy?
Kassidy was the 1039th most popular name for girls in 2025, given to 240 babies. Its best year was 2000, when it ranked 314th with 1,007 babies. Over the last ten years it has moved down 574 places. More babies were named Kassidy in the 2000s than in any other decade.
Is Kassidy a boy or girl name?
In 2021–2025, almost always a girl’s name given the name Kassidy in the US.
Where is Kassidy most popular?
In 2021–2025, Kassidy was most common in Mississippi (0.51 per 1,000 girls), followed by South Carolina and Louisiana.