This chapter shows that although often states are parties in a genocide enterprise, the centrality—and responsibility—of states for genocide does not receive attention commensurate with the severity of the problem. Indeed, genocidal states are not held criminally responsibility for genocide. Underscoring difficulties at proving state criminal responsibility for genocide, the analysis compares and contrasts individual criminal responsibility and state criminal responsible for genocide. Whereas in the former case the matter has been dealt with by domestic and international criminal courts and tribunals, in the latter case there is no international judicial authority which can try states for criminal responsibility. However, non-state corporate criminal liability, and evolution of this institute in international law, may provide some transferable lessons for state responsibility for genocide. The chapter highlights the nexus between individual responsibility and state responsibility, and the failures of international genocide law in establishing state responsibility for genocide.