Pallars Sobirà (Catalan pronunciation: [pəˈʎaz suβiˈɾa], locally: [paˈʎaz soβiˈɾa]) is a comarca (comparable to a county or shire in much of the English-speaking world) in the mountainous northwest of Catalonia, Spain. The name means "Upper Pallars", distinguishing it from the more populous (and less mountainous) Pallars Jussà to its southwest. Its capital and largest municipality is Sort.
Located in the central Pyrenees, Pallars Sobirà stretches from south to north, starting at the gorge of Collegats to the village of Alós d'Isil, following the course of the river Noguera Pallaresa. It is the fourth biggest comarca in Catalonia in terms of surface area, and has one of the lowest densities of population in the country, about 5.1 inhabitants per km². All together, it has approximately 7,000 inhabitants.
Pallars Sobirà contains the largest lake in the Pyrenees, the lake of Certascan, and the highest peak in Catalonia, the Pica d'Estats (3,143 m).