Marlies Deneke (born Marlies Kilian: 23 December 1953) is a German politician (SED / PDS).She sat as a member of the East German national parliament (Volkskammer) between March and October 1990, and then of the post-reunification Bundestag.
During and after the final months of the German Democratic Republic she was a member of the party leadership team trying to navigate the transformation of the Socialist Unity Party (Sozialistische Einheitspartei Deutschlands/ SED) from a position of dominance in the East German one-party state to its new role as the Party of Democratic Socialism (Partei des Demokratischen Sozialismus / PDS), an alternative left wing grouping operating in the multi-party context of a newly reunified Germany.