• Patrick Cassidy (actor) (born 1962), American actor in musical theatre and television
• Patrick Cassidy (composer) (born 1956), Irish composer of film soundtracks
• Patrick Cassidy (footballer) (1887–?), English professional footballer
• Patrick Sarsfield Cassidy (c. 1850–1903), Irish American journalist, poet and revolutionary

{{hndis|name=Cassidy, Patrick}}

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