Francisco Martínez Yago (2 November 1814, Paiporta - 19 January 1895, Valencia) was a Spanish painter; father of Salvador Martínez Cubells.
He began his artistic studies under the direction of Francisco Grau [es].
Later, he completed them with Francisco Llácer Valdermont (1781-1857) and Miguel Parra Abril, while enrolled at the Academia de San Carlos.
The following year, upon the death of Pedro Pérez, he was appointed to be the Academia's Keeper ("Conserje").
Most of his paintings were commissioned by individuals and organizations; notably a portrait of Bruno of Cologne for the Jesuit Church, an Assumption for the parish church in Torrente, and several works on Greek mythology for Count Parsent.