| Country: | England |
| Static Image Name: | Wooden Sheds stand on a castle site (geograph 4004166).jpg |
| Static Image Caption: | Wooden Sheds stand on a castle site on the outskirt of Thornby. Hugh de Morville claimed to hold a castle here that was burnt by the Scots in 1232. |
| Coordinates: | 54.861°N -3.098°W |
| Official Name: | Thornby |
| Civil Parish: | Aikton |
| Shire District: | Allerdale |
| Shire County: | Cumbria |
| Region: | North West England |
| Constituency Westminster: | Workington |
| Post Town: | WIGTON |
| Postcode District: | CA7 |
| Postcode Area: | CA |
| Dial Code: | 016973 |
| Os Grid Reference: | NY295524 |
| Pushpin Map: | United Kingdom Allerdale |
Thornby is a village in Cumbria, England.