| No. | Name of Island | Total Extent |
| 1. | Battalangunduwa | 145.53 ha |
| 2. | Palliyawatta | 60.89 ha |
| 3. | Vellai I | 1.55 ha |
| 4. | Vellai II | 10.80 ha |
| 5. | Vellai III | 13.70 ha |
| 6. | Uchchamunai | 449.30 ha |
| 7. | Ippantivu | 76.88 ha |
| 8. | Periya Arichchalai | 45.60 ha |
| 9. | Sinna Arichchalai | 16.82 ha |
| 10. | Eramutivu | 101.52 ha |
| 11. | Sinna Eramutivu | 2.22 ha |
| 12. | Eramutivu West | 4.53 ha |
| 13. | Kakativu | 4.53 ha |
| 14. | Mutwal(Dutch Bay) | 715.14 ha |
| Total Area | 1672.67 ha (4133.19 acs) | |