| Timezone | Sri Lanka Time |
| Area | 37.3 km² |
| Population | 316,315 (More Details) |
|
| Male Population | 159,492 (50.4%) |
| Female Population | 156,823 (49.6%) |
| Median Age | 29.3 |
| Postal Codes | 00000, 00094, 00100 (32 more) |
| Area Code | 11 |
35 Postal Codes in Colombo, Western Province
| Postal Code | City | Administrative Region | City Population |
|---|
| 00000 | Colombo | Western Province, Sri Lanka | 648,034 |
| 00094 | — | — | — |
| 00100 | Fort (Colombo) | Western Province, Sri Lanka | — |
| 00200 | Slave Island | Western Province, Sri Lanka | — |
| 00700 | Colombo | Western Province, Sri Lanka | 648,034 |
| 00900 | Colombo | Western Province, Sri Lanka | 648,034 |
| 01000 | Colombo | Western Province, Sri Lanka | 648,034 |
| 01100 | Colombo | Western Province, Sri Lanka | 648,034 |
| 01200 | Colombo | Western Province, Sri Lanka | 648,034 |
| 01300 | Kotahena | Western Province, Sri Lanka | — |
| 01400 | Colombo | Western Province, Sri Lanka | 648,034 |
| 01500 | Mutwal | Western Province, Sri Lanka | — |
| 10202 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10208 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10232 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10302 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10304 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10306 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10502 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10508 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10511 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10513 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10522 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10524 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10526 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10654 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10656 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10682 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10704 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10712 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10714 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10718 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10730 | Colombo | Western Province, Sri Lanka | 648,034 |
| 10732 | Colombo | Western Province, Sri Lanka | 648,034 |
| 67337 | Colombo | Western Province, Sri Lanka | 648,034 |
Colombo, Western Province Demographic Information
| Population | 316,315 |
| Population Density | 8,478 / km² |
| Male Population | 159,492 (50.4%) |
| Female Population | 156,823 (49.6%) |
| Median Age | 29.3 |
| Male Median Age | 28.8 |
| Female Median Age | 29.8 |
| Businesses in Colombo, Western Province | 16,229 |
| Population (1975) | 387,111 |
| Population (2000) | 386,023 |
| Population change from 1975 to 2015 | -18.3% |
| Population change from 2000 to 2015 | -18.1% |
