| Static Image: | Mountjoy, on the A392 - geograph.org.uk - 169925.jpg |
| Static Image Width: | 250px |
| Static Image Caption: | Mountjoy |
| Country: | England |
| Region: | South West England |
| Map Type: | Cornwall |
| Official Name: | Mountjoy |
| Civil Parish: | Colan |
| Unitary England: | Cornwall |
| Lieutenancy England: | Cornwall |
| Os Grid Reference: | SW871602 |
| Coordinates: | 50.403°N -4.997°W |
| Hide Services: | yes |
Mountjoy is a hamlet in the civil parish of Colan in Cornwall, England.[1] It is on the A392 road, east of Quintrell Downs.[2]