| Saint-Simon | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Montescourt-Lizerolles.svg |
| Arrondissement: | Saint-Quentin |
| Canton: | Ribemont |
| Insee: | 02694 |
| Postal Code: | 02640 |
| Mayor: | Agnès Mauger[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Saint-Quentinois |
| Coordinates: | 49.7456°N 3.1761°W |
| Elevation M: | 68 |
| Elevation Min M: | 62 |
| Elevation Max M: | 89 |
| Area Km2: | 6.34 |
Saint-Simon (in French pronounced as /sɛ̃ simɔ̃/) is a commune in the Aisne department in Hauts-de-France in northern France.
This place was the property of the House of Rouvroy, who became the Duke of Saint-Simon.