The elected members make up the Parliament of Catalonia. They are chosen by secret, direct, equal, free and universal suffrage. The electoral system laid down by the Statute is proportional: seats in Parliament are distributed among the electoral lists in proportion to the votes each one has obtained. At the same time, this system must also ensure the adequate representation of all areas in the territory of Catalonia. Until Parliament passes the electoral act, the transitional dispositions of the Statute come into effect concerning the four provincial electoral districts, which return a fixed number of deputies.

The candidates who present themselves for election are grouped in electoral lists, usually based on and organized around the programme of a political party or a coalition of parties.

The Parliament of Catalonia is currently made up of 135 MPs: 85 elected in the electoral constituency of Barcelona district, 17 in Girona, 15 from Lleida and 18 from Tarragona districts respectively.