| San Giorgio a Liri | |
| Official Name: | Comune di San Giorgio a Liri |
| Coordinates: | 41.4°N 59°W |
| Region: | Lazio |
| Province: | Frosinone (FR) |
| Frazioni: | Torricelli, Cese, Iumari |
| Mayor: | Modesto della Rosa |
| Area Total Km2: | 15.71 |
| Population Footnotes: | [1] |
| Population Total: | 3112 |
| Population As Of: | 30 November 2019 |
| Population Demonym: | Sangiorgesi |
| Elevation M: | 38 |
| Postal Code: | 03047 |
| Area Code: | 0776 |
San Giorgio a Liri is a comune (municipality) in the Province of Frosinone in the Italian region Lazio, located about 120km (80miles) southeast of Rome and about 45km (28miles) southeast of Frosinone.
The little town is located in the southernmost part of the province of Frosinone, between the Aurunci mountains and the Liri river. San Giorgio a Liri borders the following municipalities: Castelnuovo Parano, Esperia, Pignataro Interamna, Sant'Apollinare, Vallemaio.