Yves-Matthieu Dafreville (born 17 March 1982 in Saint-Pierre, Réunion) is a French judoka, who played for the middleweight category. He is also a member of the Levallois Sporting Club in Levallois-Perret, France, and is coached and trained by Patrick Rosso and Stéphane Fremont.
Dafreville represented France at the 2008 Summer Olympics in Beijing, where he competed for the men's middleweight class (90 kg). He defeated Cuba's Asley González, Italy's Roberto Meloni, and Brazil's Eduardo Santos in the preliminaries, before losing out the semi-final match, with an ippon and a kata guruma (shoulder wheel), to Algeria's Amar Benikhlef. Because Benikhlef advanced further into the final match against Georgia's Irakli Tsirekidze, Dafreville automatically qualified for the bronze medal game, where he narrowly lost the medal to Egypt's Hesham Mesbah, who successfully scored an ippon and a Te Guruma (variation of Sukui Nage), at one minute and twenty-nine seconds.