| La Terrasse-sur-Dorlay | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr La Terrasse-sur-Dorlay (Loire).svg |
| Arrondissement: | Saint-Étienne |
| Canton: | Le Pilat |
| Insee: | 42308 |
| Postal Code: | 42740 |
| Mayor: | Christian Ducceschi[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Saint-Étienne Métropole |
| Coordinates: | 45.4492°N 4.5839°W |
| Elevation Min M: | 400 |
| Elevation Max M: | 873 |
| Area Km2: | 8.69 |
La Terrasse-sur-Dorlay (in French pronounced as /la tɛʁas syʁ dɔʁlɛ/) is a commune in the Loire department in central France.
La Terrasse-sur-Dorlay takes its name from the Dorlay river, a tributary of the Gier, which flows through the commune.
The dam on the Dorlay with storage capacity of, is just upstream from the village.[2]