| Massalengo | |
| Official Name: | Comune di Massalengo |
| Coordinates: | 45.3°N 33°W |
| Region: | Lombardy |
| Province: | Lodi (LO) |
| Mayor: | Severino Serafini |
| Area Total Km2: | 8.48 |
| Population Footnotes: | [1] |
| Population Total: | 4560 |
| Population As Of: | 31 October 2017 |
| Population Demonym: | Massalenghini |
| Elevation M: | 76 |
| Postal Code: | 26815 |
| Area Code: | 0371 |
Massalengo (Lodigiano: Masaléng) is a comune (municipality) in the Province of Lodi in the Italian region Lombardy, located about 25km (16miles) southeast of Milan and about 8km (05miles) west of Lodi.
Massalengo borders the following municipalities: San Martino in Strada, Cornegliano Laudense, Pieve Fissiraga, Ossago Lodigiano, Villanova del Sillaro.