Marie-Françoise Roy (born 28 April 1950 in Paris) is a French mathematician noted for her work in real algebraic geometry.

She has been Professor of Mathematics at the University of Rennes 1 since 1985 and in 2009 was made a Chevalier of the French Legion of Honour.

[2] Marie-Françoise Roy got her education at École Normale Supérieure de jeunes filles and was an assistant professor at Université Paris Nord during 1973.

[3] She received her PhD at Université Paris Nord in 1980, supervised by Jean Bénabou.

Roy is scientific officer for Sub-Saharan Africa in Centre International de Mathématiques Pures et Appliquées, CIMPA].