Cities in Colombo are long list and complicated. Colombo is the largest city and commercial capital of Sri Lanka. Also, it is a main city of Colombo district. It is located on the west coast of the island. It is divided into several administrative divisions and zones.
Colombo city is divided in 15 areas.
| City number | City suburb |
| Colombo 1 | Fort |
| Colombo 2 | Slave Island, Union Place |
| Colombo 3 | Kollupitiya |
| Colombo 4 | Bambalapitiya |
| Colombo 5 | Havelock Town, Kirulapone, Kirulapone North, Narahenpita |
| Colombo 6 | Wellawatte, Pamankada, |
| Colombo 7 | Cinnamon Gardens |
| Colombo 8 | Borella |
| Colombo 9 | Dematagoda |
| Colombo 10 | Maradana, Panchikawatte |
| Colombo 11 | Pettah |
| Colombo 12 | Hulftsdorp |
| Colombo 13 | Kotahena, Bloemendhal |
| Colombo 14 | Grandpass |
| Colombo 15 | Modara/Mutwal, Mattakkuliya, Madampitiya |
Colombo district is divided into 13 Divisional Secretary's divisions.
- Colombo
- Dehiwala-Mount Lavinia
- Homagama
- Kaduwela
- Kesbewa
- Kolonnawa
- Maharagama
- Moratuwa
- Padukka
- Ratmalana
- Seethawaka
- Sri Jayawardenapura Kotte
- Thimbirigasyaya
Each of these divisional secretariats consists of multiple cities, towns, and villages that make up the Colombo district. Some of the major cities and towns in the district include Colombo city, Kotte, Kaduwela, Dehiwala-Mount Lavinia and Maharagama.
Colombo district has several other cities and towns besides the above mentioned areas. Here is a list of some of the other major cities and towns in the Colombo district:
- Nugegoda
- Piliyandala
- Malabe
- Battaramulla
- Boralesgamuwa
- Kadawatha
- Kelaniya
- Pannipitiya
- Athurugiriya
- Homagama
- Kaduwela
- Kottawa
- Nugegoda
- Thalawathugoda
- Maharagama
These cities and towns are located within the Colombo district and are known for their own unique characteristics, attractions, and cultural heritage.