Mata Sy Diallo (born c. 1945) is a Senegalese politician.
Known as the "lion of Ndoukoumane", her birthplace, Diallo comes from a modest background.
She began her career in local politics in Kaolack before rising to national prominence.
[1] She served in the cabinet as minister for immigration from 1991 to 1992; she was the vice-president of the National Assembly from 1995 to 2001, and in 2003 was elected president of the Mouvement National des Femmes de l'Espoir et du Progrès.
[2] She is a member of the Toucouleur people, and was also active early in her career in Kaffrine.