Winfried Hassemer (17 February 1940 – 9 January 2014) was a German criminal law scholar.
He was vice-president of the Federal Constitutional Court.Born in Gau-Algesheim, Hassemer was from 1964–1969 a scientific assistant at the Institut for laws and social philosophy of the university of Saarland.
His widow Kristiane Weber Hassemer was a judge and state secretary to Rupert von Plottnitz.
His brother Volker Hassemer was a senator in Berlin.