| name | office head of government | Mayor | image | Area (m²) | date founded | Elevation (m) | Country | administrative division | continent | latitude (°) | waterbody | longitude (°) | Website | population (people) | Demonym | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Colombo |  | 37,310,000 | 1 | Sri Lanka | Western | Asia | 6.9344444275 | Kelani River | 79.8427810669 | website | 752,993 | Map | ||||
| Moratuwa | 28 | Sri Lanka | Western | Asia | 6.7990722656 | 79.8766784668 | website | 168,280 | Map | |||||||
| Negombo |  | 30,000,000 | 2 | Sri Lanka | Western | Asia | 7.2111110687 | 79.8386077881 | website | 142,136 | Map | |||||
| Gampaha |  | 13,000,000 | 15 | Sri Lanka | Western | Asia | 7.0916666985 | 79.9997253418 | website | 191,040 | Map | |||||
| Sri Jayawardenepura Kotte |  | 17,000,000 | 27 | Sri Lanka | Western | Asia | 6.9108333588 | 79.8877792358 | website | 115,826 | Map |