Duel Personality is a 1966 Tom and Jerry cartoon produced and directed by Chuck Jones. It is the first Tom and Jerry cartoon released in 1966, with animation by Don Towsley, Tom Ray, Dick Thompson, Ben Washam and Ken Harris. It is also the first Tom & Jerry cartoon (both regarding Tom and Jerry produced by Chuck Jones, and Tom and Jerry cartoons produced altogether) with Dean Elliott as the music composer.

This is one of the very few shorts in which Tom emerges victorious over Jerry.

The title of this cartoon is a play on the concept of a dual personality, scientifically known as dissociative identity disorder.