Arthur "Art" Tatum, Jr. (/ˈteɪtəm/, October 13, 1909 – November 5, 1956) was an American jazz pianist.

Tatum is widely acknowledged as a virtuoso and one of the greatest jazz pianists of all time, and was a major influence on later generations of jazz pianists. He was hailed for the technical proficiency of his performances, which set a new standard for jazz piano virtuosity. Critic Scott Yanow wrote, "Tatum's quick reflexes and boundless imagination kept his improvisations filled with fresh (and sometimes futuristic) ideas that put him way ahead of his contemporaries."

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