| Country: | England |
| Static Image Name: | Forgotten Phone Box - geograph.org.uk - 74015.jpg |
| Static Image Caption: | Thornhill |
| Coordinates: | 53.348°N -1.704°W |
| Map Type: | Derbyshire |
| Official Name: | Thornhill |
| Population: | 154 |
| Population Ref: | (2011) |
| Shire District: | High Peak |
| Shire County: | Derbyshire |
| Region: | East Midlands |
| Post Town: | HOPE VALLEY |
| Postcode District: | S33 |
| Postcode Area: | S |
| Os Grid Reference: | SK198834 |
Thornhill is a village and civil parish in the county of Derbyshire, England, in the Peak District, south of Ladybower Reservoir and east of Castleton. The population of the civil parish at the 2011 census was 154.[1]