Two levels were introduced: a national level to divide the seats among parties and a constituency level to distribute them among candidates in open lists. Five constituencies were established, each including 2–5 regions and each electing a fixed number of MEPs. At national level, seats are divided between party lists using the largest remainder method with Hare quota. Seats are allocated to parties and then to their most voted candidates.
In the run-up of the election, the Italian Parliament has introduced a national threshold of 4% in the electoral law for the European Parliament. An exception was granted for parties representing some linguistic minorities as such lists can be connected with one of the major parties, combining their votes, provided that those parties reach the 4% threshold and that candidates from minority parties obtain a sufficient number of votes, no less than 50,000 for the main candidate.
Main parties and leaders
Outgoing MEPs
This is a list of Italian delegations sitting at the European Parliament before 6 June 2009.
On 1 December 2009, after the entry into force of the Treaty of Lisbon, the Italian seats in the European Parliament increased from 72 to 73. The additional seat was assigned to the Union of the Centre (that went from 5 to 6 seats).