| Castelo de Montalegre | |
| Location: | Montalegre, Portugal |
| Type: | Medieval fortress |
| Built: | 1279-1325 |
| Builder: | Dinis of Portugal |
| Condition: | Intact |
| Ownership: | Portuguese Republic |
| Events: | Portuguese Restoration War |
The Montalegre Castle is a Portuguese medieval castle and National monument in Montalegre, Vila Real.