June 1989 Greek parliamentary election

Parliamentary elections were held in Greece on 18 June 1989. The liberal-conservative New Democracy party of Konstantinos Mitsotakis, supported by leftist parties under Synaspismos headed by Charilaos Florakis, defeated the ruling PASOK party of Andreas Papandreou.

The elections took place in a tense and polarized atmosphere, amplified by both sides. New Democracy and Leftist parties under Synaspismos campaigned on accusations of corruption against PASOK amid a series of growing scandals, most notably the Koskotas and Yugoslav corn affairs. In response, Papandreou introduced laws aimed at stalling the investigations and used the state monopoly over mass media to contain the scandals. Moreover, he changed the electoral law shortly before the elections, a move designed to prevent New Democracy from securing an absolute majority. On election day, multiple election irregularities by the state were reported.

New Democracy secured a 5% lead in the popular vote, but the newly revised electoral law prevented it from forming a government. The second party, PASOK also failed to form a government because the other Leftist parties refused to provide support. The stalemate was broken with the unexpected agreement between New Democracy and Synaspismos to form a short-term government with a limited mandate of "katharsis," a thorough investigation of PASOK's corruption. Tzannis Tzannetakis was chosen as a compromise to lead the coalition government and it was dissolved after the indictment of Papandreou of four of his ministers in connection to the Koskotas scandal on 7 October. This marked the first and, as of 2025, the only occasion when the Communist Party of Greece (as part of Synaspismos) joined a governing coalition.