Cassidy is a girl name with a modern feel, drawn from real birth records. Below you'll find what Cassidy means and where it comes from, plus how many babies have been named Cassidy across the United States, UK, Ireland and New Zealand, how popular Cassidy has been over the decades, and the year it peaked.
Cassidy is a girl name of Irish (Gaelic) origin meaning “curly-haired or clever”. From the Irish surname O Caiside.
| Country | Births on record |
|---|---|
| United States since 1880 | 64,583 births |
| England & Wales since 1996 | 1,695 births |
| Scotland since 1974 | 141 births |
| Northern Ireland since 1997 | 19 births |
| Ireland since 1964 | 49 births |
Counts come from official national birth-registration statistics: U.S. Social Security Administration, England & Wales (Office for National Statistics), Scotland (National Records of Scotland), Northern Ireland (NISRA), Ireland (Central Statistics Office) and New Zealand (Dept. of Internal Affairs). Coverage spans differ, so totals aren't directly comparable across countries.
Babies named Cassidy per year, United States (1968 to 2025). United States peaked in 1999 (3,449/yr) · England & Wales peaked in 2010 (85/yr) · Scotland peaked in 2009 (11/yr) · Ireland peaked in 2009 (5/yr) · Northern Ireland peaked in 2008 (4/yr).
Cassidy has been a fairly common baby name in the United States. It was most common in 1999, when it ranked #201 nationally (given to 3,485 babies that year), and a popular choice in the 1990s.
Kassidy · Cassady · Kassidi · Cassadee · Cassidi · Kasidy · Kassidee · Cassidie
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