| Timezone | Brunei Time |
| Area | 86.6 km² |
| Population | 33,995 (More Details) |
|
| Male Population | 18,033 (53%) |
| Female Population | 15,962 (47%) |
| Median Age | 29.9 |
| Postal Codes | KA1131, KA1331, KA1531 (8 more) |
| Area Code | 3 |
11 Postal Codes in Kuala Belait, Belait District
| Postal Code | City | Administrative Region | City Population |
|---|
| KA1131 | Kuala Belait | Belait District | 31,178 |
| KA1331 | Kuala Belait | Belait District | 31,178 |
| KA1531 | Kuala Belait | Belait District | 31,178 |
| KA1731 | Kuala Belait | Belait District | 31,178 |
| KA1931 | Kuala Belait | Belait District | 31,178 |
| KA2131 | Kuala Belait | Belait District | 31,178 |
| KA2331 | Kuala Belait | Belait District | 31,178 |
| KA2931 | Kuala Belait | Belait District | 31,178 |
| KA3131 | Kuala Belait | Belait District | 31,178 |
| KA3331 | Kuala Belait | Belait District | 31,178 |
| KA3531 | Kuala Belait | Belait District | 31,178 |
Kuala Belait, Belait District Demographic Information
| Population | 33,995 |
| Population Density | 392.4 / km² |
| Male Population | 18,033 (53%) |
| Female Population | 15,962 (47%) |
| Median Age | 29.9 |
| Male Median Age | 29.9 |
| Female Median Age | 29.8 |
| Businesses in Kuala Belait, Belait District | 1,708 |
| Population (1975) | 17,445 |
| Population (2000) | 29,890 |
| Population change from 1975 to 2015 | +94.9% |
| Population change from 2000 to 2015 | +13.7% |
