| San Giorio di Susa | |
| Official Name: | Comune di San Giorio di Susa |
| Coordinates: | 45.1333°N 17°W |
| Region: | Piedmont |
| Metropolitan City: | Turin (TO) |
| Frazioni: | Adrit, Airassa, Balma, Città, Garda, Grangia, Martinetti, Pognant, Viglietti |
| Mayor: | Danilo Bar |
| Area Total Km2: | 19.6 |
| Population Total: | 979 |
| Population As Of: | 31 July 2018[1] |
| Population Demonym: | Sangioriesi |
| Elevation M: | 420 |
| Saint: | Saint George |
| Day: | April 23 |
| Postal Code: | 10050 |
| Area Code: | 0122 |
San Giorio di Susa (San Gieuri, San Gœri, French: Saint-Joire) is a comune (municipality) in the Metropolitan City of Turin in the Italian region Piedmont, located about 45 km west of Turin.
San Giorio di Susa borders the following municipalities: Bruzolo, Chianocco, Bussoleno, San Didero, Villar Focchiardo, Coazze, Roure.
The castle of San Giorio di Susa was visited by King Edward I of England in 1273 on his way back from crusade. The distinctive three pinnacled merlons of the crenellations were later copied at Conwy Castle in Wales.