| Kokkilai | |
| Native Name: | கொக்குளாய் |
| Settlement Type: | Town |
| Pushpin Map: | Sri Lanka Northern Province |
| Subdivision Type: | Country |
| Subdivision Name: | Sri Lanka |
| Subdivision Type2: | Province |
| Subdivision Name2: | Northern |
| Subdivision Type3: | District |
| Subdivision Type4: | DS Division |
| Subdivision Name4: | Maritimepattu |
| Coordinates: | 9°N 80.95°W |
Kokkilai or Kokilai or Kokkulaay (Tamil: கொக்குளாய் Kokkuḷāy Sinhalese: කෝකිලායි) is a town in the Mullaitivu District, Sri Lanka. It is located about 40 km south-east of the District capital Mullaitivu. It is a coastal town, located next to Kokkilai lagoon, it is also close to Trincomalee District border.