The commune has an area of 8810 km2 and a population of 6178 people distributed mainly in the towns of Pica, Matilla, Lirima, and mining Cancosa Collahuasi and Quebrada Blanca. Geographically characterized by different environments of the pampas, highlands and mountains, ranging from 1,250 to 5,000 m; a pleasant sun and clear skies for most of the year in the area of the pampas to the rigors of winter in the highland area the plateau and mountain range. Inhabited since pre-Columbian times by different cultures.
The Commune of pica is known abroad mainly for its citrus crops, the most named LEMON PICA, as well as in the past were its vineyards, which produced some of the best port wines throughout the North of Chile. Large areas of crops were seen in the towns of Pica, Matilla, Quisma Valley and vicinity, and these lemon, orange, pomelo, mango, guava and Andean villages of Lirima Cancosa and quinoa. But not only live the Commune agriculture, tourism breaks through strongly as one of the main economic activities along with agriculture, trade and mining.