George Cassidy

• George W. Cassidy, U. S. representative from Nevada, 1881–1885
• One of Butch Cassidy's many aliases
• George Cassidy (Australian footballer), Australian footballer for Melbourne
• George [Henry Cassidy], Anglican bishop of Southwell and Nottingham
• George Cassidy (coach), college football coach
• George Cassidy (jazz musician), jazz musician and music teacher of Van Morrison