| Castle of Soto | |
| Native Name: | Castillo de Soto |
| Native Language: | es |
| Coordinates: | 43.1632°N -5.6444°W |
| Location: | Aller, Asturias, Spain |
| Designation1: | Spain |
| Designation1 Offname: | Castle of Soto (Aller) |
| Designation1 Type: | Immovable |
| Designation1 Criteria: | Monument |
| Designation1 Date: | 1983 |
Castle of Soto (Aller) is a castle situated in Aller, Asturias, Spain. It was declared Bien de Interés Cultural on 10 July 1975.