| Thorncombe Beacon | |
| Map: | Dorset |
| Coordinates: | 50.72°N -2.8013°W |
| Settlement: | Symondsbury |
| Country: | United Kingdom |
| State: | Dorset |
| Grid Ref Uk: | SY437913 |
Thorncombe Beacon is a hill between Bridport and Charmouth in Dorset, England. It lies about 1km (01miles) west of Eype Mouth and 2km (01miles) east of Seatown. It is in the south-west part of Symondsbury parish close to the parish of Chideock. It is 157m (515feet) high, compared to 191m (627feet) for Golden Cap which lies about 3km (02miles) to the west. It forms part of the Jurassic Coast, a World Heritage Site and the South West Coast Path and the Monarch's Way skirt the hilltop.
The hill is owned by the National Trust. Three bowl barrows to the north-east of the summit constitute a scheduled monument.