Muscadin Jean Yves Jason (born May 21, 1964) is a Haitian politician and Professor who served as Mayor of Port-au-Prince, the capital of Haiti from 2008 to 2012.

Since his election as mayor of Port-au-Prince in 2007, he has increased exchanges between the capital and many foreign cities as part of decentralized international cooperation: Montreal (Quebec, Canada), Montevideo (Uruguay), Lamentin (Guadeloupe, France), Milan (Italy), Santiago de Cuba, Baton Rouge (Louisiana, United States) and Mexico (Mexico).

Jean-Yves Jason was also received by the Secretary of State, Fadela Amara, for a partnership as part of a program to train actors in the Haitian capital in urban, social and economic mastery.

As Jean-Yves Jason's term has come to an end, and following disagreements with the President of the Republic Michel Martelly, the latter dismisses the mayor and his city council.

By an order dated 23 February 2012, he replaced them with a three-member municipal commission chaired by Gabrielle Hyacinthe, assisted in his duties by Jean-Marie Descorbettes and Junior Gérald Estimé1.