Mario Fernández Pelaz (4 November 1943 – 10 December 2024) was a Spanish lawyer and politician. A member of the Basque Nationalist Party and Eusko Alkartasuna, he served as Deputy Lehendakari from 1982 to 1985, as Basque Minister of Labour from 1980 to 1984, and was a member of the Basque Parliament from 1984 to 1986.
Fernández died in Las Arenas on 10 December 2024, at the age of 81.