Legislative elections were held in Greece on Sunday, 17 June 2012, to elect all 300 members to the Hellenic Parliament in accordance with the constitution, after all attempts to form a new government failed following the May elections. If all attempts to form a new government fail, the constitution directs the president to dissolve a newly elected parliament, and then to call for new parliamentary elections within 30 days of the dissolution. The president announced at 16 May the date for the new election, and signed the formal decree to dissolve the parliament and call for the election at 19 May.

The Parliament of the Hellenes, commonly known as the Hellenic Parliament, is the unicameral legislature of Greece, located in the Old Royal Palace, overlooking Syntagma Square in Athens. The parliament is the supreme democratic institution that represents the citizens through an elected body of Members of Parliament (MPs).