This entry presents an overview of prison violence and how issues such as overcrowding and scarcity of resources may contribute. Exploring both collective and interpersonal levels of violence, issues such as incidents between inmates and those between inmates and staff are examined. This entry looks at the issues facing males, females, juveniles, and the mentally ill as they contend with correctional institutions and violence within these institutions. The potential effects of violent victimization are also examined, as well as potential interventions and solutions to reduce violence.