Rubió is a rural municipality in the comarca of Anoia in Catalonia, Spain. Its administrative centre is the village of Rubió, and other villages include Maçana and El Pla de Rubió. As of 2014, the municipality had 228 inhabitants. At 48 square kilometres (19 sq mi) it is one of the largest municipalities of the Alta Segarra, and at one time was the most sparsely populated.