The comarca of Roussillon (pronounced as /fr/; Catalan; Valencian: Rosselló, pronounced as /ca/) is a historical Catalan comarca of Northern Catalonia, now part of the French department of Pyrénées-Orientales. Its capital is Perpignan (Catalan: Perpinyà).
Rosselló has an area of 1,498 km². In 1990, Rosselló had a population of 303,850 inhabitants, with a density of 202.8 people per km².
It comprises most of the historic county and province of Roussillon.