Domingo Santos (born 1942) is the pseudonym of Spanishscience fiction author Pedro Domingo Mutiñó. He is among the best known science fiction authors in Spain. Together with Sebastián Martínez and Luis Vigil he founded the Spanish science fiction magazine Nueva Dimensión. A science fiction prize, awarded annually at the national science fiction convention HispaCon, is named in his honor.
He has also used the pseudonyms Peter Danger and Peter Dean.