Dión M. Martínez (26 June 1837 – 11 March 1928) was a Cuban–born American chess master. He was regarded as one of the strongest chess players in Philadelphia. There he played several matches against James Mason (4 : 5 in 1874 and 3 : 1 in 1875), Wilhelm Steinitz (0 : 7 in November 1882, 2.5 : 4.5 in December 1882, and 1 : 10 in 1883), and Johannes Zukertort (3.5 : 9.5 in 1884).