| Country: | England |
| Coordinates: | 54.025°N -1.74°W |
| Official Name: | Thornthwaite |
| Static Image: | St Saviour's Church, Thornthwaite - geograph.org.uk - 56615.jpg |
| Static Image Caption: | St. Saviour's Church |
| Population: | 220 |
| Civil Parish: | Thornthwaite with Padside |
| Unitary England: | North Yorkshire |
| Lieutenancy England: | North Yorkshire |
| Region: | Yorkshire and the Humber |
| Post Town: | HARROGATE |
| Postcode District: | HG3 |
| Postcode Area: | HG |
| Os Grid Reference: | SE172588 |
Thornthwaite is a small village in the Harrogate district of North Yorkshire, England. It lies in the valley of Padside Beck, a side valley on the south side of Nidderdale, 9miles west of Harrogate.
Padside Beck is crossed by a packhorse bridge thought to date from the 15th century. It was probably on a packhorse route from Ilkley to Fountains Abbey, and may have been constructed by the abbey. The bridge is a Scheduled Ancient Monument.
Thornthwaite is the largest settlement in the civil parish of Thornthwaite with Padside, historically a township in the ancient parish of Hampsthwaite. It became a separate civil parish in 1866.[1] The parish includes the hamlet of Padside, a mile west of Thornthwaite, and extends 6miles north-west of the village to the upper valley of the River Washburn. The population of the parish is estimated at 220,[2] In the 2011 census the population of the parish was included with Thruscross, and the total of the two parishes was 312.