Oliana is a municipality in the comarca of the Alt Urgell in Catalonia, Spain. It is situated in the Segre valley immediately below the Oliana reservoir. There is factory of domestic electrical appliances in the town, and the presence of non-farming employment has meant that Oliana has escaped the depopulation experienced by most municipalities in north-west Catalonia. It is currently the second-largest town (by population) in the Alt Urgell, behind the comarcal capital La Seu d'Urgell. The town is served by the C-14 road between Ponts and La Seu d'Urgell.