| Thunukkai | |
| Native Name: | துணுக்காய் |
| Settlement Type: | Town |
| Pushpin Map: | Sri Lanka Northern Province |
| Subdivision Type: | Country |
| Subdivision Name: | []] |
| Subdivision Type2: | Province |
| Subdivision Name2: | Northern |
| Subdivision Type3: | District |
| Subdivision Type4: | DS Division |
| Subdivision Name4: | Thunukkai |
| Coordinates: | 9.1333°N 80.2833°W |
Thunukkai (Tamil: துணுக்காய், Sinhala; Sinhalese: තුනුක්කායි) is a town in the Mullaitivu District, Sri Lanka. It is located about 17 km from Mankulam & 4 km from Mallavi.