Vitry-sur-Seine (vētrēˈ-sür-sĕn) [key], city (1990 pop. 82,820), Val-de-Marne dept., N central France, on the Seine River; an industrial suburb SE of Paris. The chief products are lighting and heating equipment and chemicals. There is some market gardening. In the St. Germain Church (13th–14th cent.) are the tombs of the former lords of Vitry.