| Mongiardino Ligure | |
| Official Name: | Comune di Mongiardino Ligure |
| Coordinates: | 44.6333°N 13°W |
| Region: | Piedmont |
| Province: | Alessandria (AL) |
| Frazioni: | Borneto, Camere Nuove, Canarie, Casa di Ragione, Casalbusone, Castellaro, Cavanna, Cerendero, Correio, Fubbiano, Ghiare, Gordena, Gorreto, Lago Cerreto, Lago Patrono (communal seat), Maggiolo, Mandirola, Montemanno, Mulino Cascè, Peio, Piansuolo, Prato, Rovello Inferiore, Rovello Superiore, Salata Mongiardino, Vergagni |
| Mayor: | Alessia Morando |
| Area Total Km2: | 29.14 |
| Population Footnotes: | [1] |
| Population Total: | 149 |
| Population As Of: | 31 December 2019 |
| Population Demonym: | Mongiardinesi |
| Elevation M: | 600 |
| Saint: | St. John the Baptist |
| Day: | 24 June |
| Postal Code: | 15060 |
| Area Code: | 0143 |
Mongiardino Ligure is a comune (municipality) in the Province of Alessandria in the Italian region Piedmont, located about 120km (80miles) southeast of Turin and about 50km (30miles) southeast of Alessandria.