Suello (Brianzöö: Süèl) is a comune (municipality) in the Province of Lecco in the Italian region Lombardy, located about 40 kilometres (25 mi) northeast of Milan and about 7 kilometres (4 mi) southwest of Lecco. As of 31 December 2004, it had a population of 1,587 and an area of 2.6 square kilometres (1.0 mi²). Lago di Annone is located on its borders.

Suello borders the following municipalities: Annone di Brianza, Cesana Brianza, Civate.