President: Karolos Papoulias
Born in 1929, veteran Pan Hellenic Socialist Movement (Pasok) foreign minister Karolos Papoulias was elected president by parliament in 2004, and again for a final five-year term in 2010.
The presidency is a largely ceremonial post, as executive power resides with the prime minister, but Greece's debt crisis has thrust President Papoulias into the political foreground as he tries to maintain a stable government in the face of public anger and a divided political class.
At the end of December 2014 parliament failed at the third attempt to approve a new successor to Mr Papioulias, triggering a snap election with the potential to force a change of government.
Prime Minister: Alexis Tsipras