Montanaso Lombardo (Lodigiano: Muntanas) is a comune (municipality) in the Province of Lodi in the Italian region Lombardy, located about 45 kilometres (28 mi) southeast of Milan and about 2 kilometres (1 mi) northeast of Lodi.

Montanaso Lombardo borders the following municipalities: Mulazzano, Boffalora d'Adda, Galgagnano, Tavazzano con Villavesco, Lodi.

A celebration is held at The Church of St. George the Martyr on the third Sunday in October to honor the patron saint.

[3] The Church of the Assumption of the Blessed Virgin Mary is located in the town square.

[4] Our Lady of Arcagna Sanctuary is also located in Montanaso Lombardo.