Gregor Gysi (German pronunciation: ; born January 16, 1948) is a German attorney and key politician of the Left Party. He played an important role in the end of communist rule in East Germany in 1989, and was a main figure in the post-reunification Party of Democratic Socialism (PDS).

His father, Klaus Gysi, was a high-ranking official in East Germany, and had been Minister of Culture from 1966 to 1973. His mother Irene was the sister of Gottfried Lessing, who was married to the British writer Doris Lessing during his exile in Southern Rhodesia.

His sister Gabriele is an actress, who left East Germany in 1985. Today, she is chief dramaturge at the Volksbühne.