This poster discusses the effectiveness of the Indonesian Criminal Code (KUHP) in addressing overcrowding in correctional institutions (Lapas). It examines the relationship between criminal policy, sentencing practices, and the increasing number of inmates. The discussion highlights the implementation of the KUHP and its potential role in reducing overcrowding through more proportional sentencing and alternative measures. The poster aims to provide an overview of the challenges and possible solutions to overcrowding in Indonesian correctional institutions.