Tilly (Walloon: Tiyî) is a village and sub-municipality of the municipality of Villers-la-Ville, in the Belgian province of Walloon Brabant. It had a population of 1,707 inhabitants on December 31, 2007.
Near the village lies a Gallo-Roman tumulus called the Tumulus of Tilly.
Coordinates: 50°34′N 4°33′E / 50.567°N 4.550°E