Dennis McCarthy
Dennis McCarthy may refer to:
- Dennis McCarthy (scientist), American scientist
- Dennis McCarthy (composer), American composer
- Dennis McCarthy (politician), United States congressman and acting lieutenant governor of New York
- Dennis McCarthy (radio presenter), British radio presenter
- Denis Florence MacCarthy, Irish poet
- Dennis M. McCarthy, U.S. Marine Corps general
- Dennis McCarthy, shooting victim of Colin Ferguson
- Dennis McCarthy, Irish merchant settled in Bordeaux, owner of the Château MacCarthy in the Médoc wine region