| Fombio | |
| Official Name: | Comune di Fombio |
| Coordinates: | 45.15°N 51°W |
| Region: | Lombardy |
| Province: | Lodi (LO) |
| Frazioni: | Retegno |
| Mayor: | Franco Stefanoni |
| Area Total Km2: | 7.4 |
| Population Footnotes: | [1] |
| Population Total: | 2342 |
| Population As Of: | 31 August 2017 |
| Population Demonym: | Fombiesi |
| Elevation M: | 56 |
| Postal Code: | 26861 |
| Area Code: | 0377 |
Fombio (Lodigiano: Fùmbi) is a comune (municipality) in the Province of Lodi in the Italian region Lombardy, located about 50km (30miles) southeast of Milan and about 25km (16miles) southeast of Lodi.
It was the site of the Battle of Fombio in 1796.
Fombio borders the following municipalities: Codogno, Somaglia, San Fiorano, Santo Stefano Lodigiano, Guardamiglio, San Rocco al Porto.