| Country: | England |
| Coordinates: | 54.6181°N -3.204°W |
| Official Name: | Thornthwaite |
| Static Image: | Thornthwaite village church (geograph 2416026).jpg |
| Static Image Caption: | St. Mary's Church, Thornthwaite |
| Civil Parish: | Above Derwent |
| Shire District: | Allerdale |
| Shire County: | Cumbria |
| Region: | North West England |
| Constituency Westminster: | Penrith and Solway |
| Post Town: | KESWICK |
| Postcode District: | CA12 |
| Postcode Area: | CA |
| Dial Code: | 017687 |
| Os Grid Reference: | NY222254 |
| Pushpin Map: | United Kingdom Allerdale |
Thornthwaite is a village in Cumbria, England. Historically in Cumberland, it is just off the A66 road, south of Bassenthwaite Lake and within the Lake District National Park. It is by road from Keswick.[1] In 1861 the township had a population of 153.[2] The place-name contains thwaite ("clearing").[3]
For administrative purposes, Thornthwaite lies within the civil parish of Above Derwent, the district of Allerdale, and the county of Cumbria. It is within the Copeland constituency of the United Kingdom Parliament. Prior to Brexit in 2020 it was part of the North West England constituency of the European Parliament.[1]
St Mary's Church is located a short distance east of the village. It was built in 1831, replacing an earlier church of c.1760 on the same site.[4] The Church is a Grade II listed building.