| Lake Fianga | |
| Coords: | 9.9667°N 27°W |
| Inflow: | Logone River |
| Outflow: | Mayo Kebbi |
| Pushpin Map: | Cameroon#Africa |
| Pushpin Map Alt: | Location of Lake Fianga in Cameroon. |
Lake Fianga is a lake in Chad and Cameroon. It does not have clearly delineated borders, as it forms the western border of an area of permanent swampland.[1] The lake forms with the seasonal flooding of the Logone River.