The Panhellenic Socialist Movement, known mostly by its acronym PASOK, is a social-democratic political party in Greece. Until 2012 it was one of the two major parties in the country, along with New Democracy, its main political rival. In the June 2023 Greek legislative election it once again held firm on to its position of one of the ”big three” political parties of Greece.

Legislative elections were held in Greece on Sunday 25 January 2015 to elect all 300 members of the Hellenic Parliament in accordance with the constitution. The election was held earlier than scheduled due to the failure of the Greek parliament to elect a new president on 29 December 2014.