Suisio is a municipality in the Italian region of Lombardy, located about 35 kilometres northeast of Milan and about 20 kilometers west of Bergamo. It had a population of 3 794 inhabitants and an area of 4.6 square kilometres.
Suisio borders the following municipalities: Bottanuco, Chignolo d'Isola, Cornate d'Adda, Medolago. From Wikipedia