Lothar Bisky (17 August 1941 – 13 August 2013) was a German politician.
He was the chairman of the Party of Democratic Socialism (PDS), the successor of East Germany's Socialist Unity Party (SED).
In June 2007 he became co-chairman of The Left (Die Linke) party, formed by a merger of the PDS and the much smaller Labour and Social Justice – The Electoral Alternative.
From 2007 until 2010 he was the President of the Party of the European Left.
Also, he was the Publisher of the socialist newspaper Neues Deutschland.