João Mário Ribeiro (10 June 1929 – 21 September 2021) was a Portuguese chess player, three-time Portuguese Chess Championships winner (1954, 1963, 1971).
From the mid-1950s to the mid-1970s João Mário Ribeiro was one of Portugal's leading chess players.
He three times won Portuguese Chess Championships: 1954, 1963, and 1971.
In 1954, in Munich João Mário Ribeiro participated in World Chess Championship Zonal tournament.
This biographical article relating to a Portuguese chess figure is a stub.