Michael Cassidy
Michael or Mike Cassidy may refer to:
- Michael Cassidy (Canadian politician)
- Michael E. Cassidy, American politician
- Michael Cassidy (actor), American film and television actor
- Michael Cassidy (sailor), American Civil War sailor and Medal of Honor recipient
- Mike Cassidy (entrepreneur), American entrepreneur; CEO and co-founder of Internet start-ups
- Mike Cassidy (Canadian football), American and Canadian football player
- Mike Cassidy (spearfisher), Guamanian spearfisher
- Mick Cassidy, English rugby league player
- Michael Cassidy (evangelist), South African Christian evangelist