Mario D'Agata (29 May 1926 – 4 April 2009) was an Italian professional boxer, who was the first, and so far only, deaf world champion in boxing.

His parents moved him from Tuscany to Rome at an early age, hoping to find doctors who would cure him.

He built a record of 10–0 with 1 knockout before suffering his first loss, at the hands of Romolo Re, 2 August 1951, by a decision in ten.

Another loss to Re would follow, but D'Agata was able to build a 19–3–2 record with 4 knockouts before challenging for the Italian bantamweight title, on 26 September 1953, beating Gianni Zuddas by a disqualification in round nine to claim the belt.

After five more wins, he travelled to Tunisia, where he met the future world champion Robert Cohen, losing a ten-round decision.

D'Agata went to Paris to defend his title for the first time, on 1 April 1957, against local challenger Alphonse Halimi.

In addition to enduring disabilities, he also survived an attempt on his life before becoming a world champion, after being shot in the chest by a business partner in Australia, on 12 February 1955.