Mario Righetti (born c. 1590) was an Italian painter of the Baroque period.
He was born at Bologna He became a pupil of Lucio Massari. In Bologna, he painted an Archangel Michael for the church of S. Guglielmo; a Christ appearing to the Magdalen for San Giacomo Maggiore; an Adoration of the Magi for S. Agnese; and a Nativity for the church of Santa Lucia.