Colli del Tronto ("Tronto's hills") is a comune (municipality) in the Province of Ascoli Piceno in the Italian region Marche, located about south of Ancona and about northeast of Ascoli Piceno. As of 31 December 2004, it had a population of 3,290 and an area of .
Colli del Tronto borders the following municipalities: Ancarano, Ascoli Piceno, Castorano, Spinetoli.