| Settlement Type: | village and municipality |
| Cubillos del Sil | |
| Pushpin Map: | Spain |
| Coordinates: | 42.6236°N -6.5636°W |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | El Bierzo |
| Subdivision Name4: | Cubillos del Sil |
| Leader Title: | Mayor |
| Leader Name: | José Luis Ramón Corral |
| Leader Party: | PSOE |
| Area Total Km2: | 53.41 |
| Elevation M: | 577 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Population Demonym: | cubillense |
| Postal Code Type: | Postal Code |
| Postal Code: | 24492 |
| Area Code Type: | Telephone prefix |
| Area Code: | 987 |
Cubillos del Sil (pronounced as /es/) is a village and municipality located in the region of El Bierzo (province of León, Castile and León, Spain). It is located near Ponferrada, the capital of El Bierzo. Cubillos del Sil has about 1,771 inhabitants.
Its economy was traditionally based on agriculture, wine and coal mining. Nowadays, most of the inhabitants work in the surrounding area on activities such as electricity generation manufacturing in ENDESA (Compostilla II Power Station).
Cubillos del Sil also has a large reservoir in its vicinity, the Barcena reservoir, which many tourists visit during the summer.