| Biləsər | |
| Settlement Type: | Municipality |
| Pushpin Map: | Azerbaijan |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: |  Azerbaijan |
| Subdivision Type1: | Rayon |
| Subdivision Name1: | Lankaran |
| Population Total: | 1884 |
| Timezone: | AZT |
| Utc Offset: | +4 |
| Utc Offset Dst: | +5 |
| Coordinates: | 38.6275°N 48.7°W |
Biləsər (also, Bilyasar) is a village and municipality in the Lankaran Rayon of Azerbaijan. It has a population of 1,884. The municipality consists of the villages of Biləsər, Ələzəpin, Seliqavol, and Viy.[1]