| population | |
| Colombo Division | 318048 |
| Dehiwala | |
| Homagama Division | 236179 |
| Kaduwela Division | 252057 |
| Kesbewa Division | 244062 |
| population | |
| Kolonnawa Division | 190817 |
| Maharagama | |
| Moratuwa Division | 167160 |
| Padukka | |
| Ratmalana |
 | Diyawanna Oya Seaplane Base | ~ 12.69 km |
| Kelani-Peliyagoda Seaplane Base | ~ 13.33 km |
| Colombo Ratmalana Airport | ~ 15.22 km |
| Beira Lake Seaplane Base | ~ 19.25 km |
| Dandugama Seaplane Base | ~ 31.23 km |
| Katukurunda Air Force Base | ~ 35.21 km |
| Bandaranaike International Colombo Airport | ~ 37.89 km |
| Bentota River Waterdrome | ~ 48.47 km |
| Castlereagh Lake Seaplane Base | ~ 62.64 km |
