| Saint-Simon | |
| Commune Status: | Commune |
| Arrondissement: | Aurillac |
| Canton: | Vic-sur-Cère |
| Insee: | 15215 |
| Postal Code: | 15130 |
| Mayor: | Nathalie Gardes[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Bassin d'Aurillac |
| Coordinates: | 44.9639°N 2.4908°W |
| Elevation M: | 670 |
| Elevation Min M: | 655 |
| Elevation Max M: | 1031 |
| Area Km2: | 27.27 |
Saint-Simon (in French pronounced as /sɛ̃ simɔ̃/; Auvergnat: Sant Simon) is a commune in the Cantal department in south-central France.
The medieval town of Belliac, located near the present-day Saint-Simon, was the birthplace (in 946) of the prolific scholar Gerbert d'Aurillac, who became Pope Sylvester II, the first of the French popes.