| Saint-Cyr-la-Rivière | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Cyr-la-Rivière (Essonne).svg |
| Coordinates: | 48.3547°N 2.1481°W |
| Insee: | 91544 |
| Postal Code: | 91690 |
| Arrondissement: | Étampes |
| Canton: | Étampes |
| Intercommunality: | CA Étampois Sud Essonne |
| Mayor: | Christèle Deloison[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 72 |
| Elevation Max M: | 146 |
| Area Km2: | 8.81 |
Saint-Cyr-la-Rivière (in French pronounced as /sɛ̃ siʁ la ʁivjɛʁ/) is a commune in the Essonne department in Île-de-France in northern France.
Inhabitants of Saint-Cyr-la-Rivière are known as Saint-Cyriens.
The village lies on the left bank of the Éclimont, which forms the commune's northeastern border and flows into the Juine, which flows northeast through the northwestern part of the commune.