Bassella is a municipality in the comarca of the Alt Urgell, in Catalonia, Spain. The village of Bassella, one of nine settlement which make up the municipality, is located at the confluence of the Segre river with the Salada river and at the point where the route from Solsona and the potash mines of Cardona (currently the L-301 road) meets the route between Lleida and La Seu d'Urgell (currently the C-1313 road). The ajuntament (town hall) is located in Castellnou de Bassella.
The municipality extends to both sides of the Segre river at the southern extremity of the Alt Urgell. Much of the territory has been flooded by the construction of the Rialb reservoir. It includes the southern exclave of Sant Mer within Pinell de Solsonès.