School-based violence is serious, and on the rise in South African schools. The violence affects learners, teachers, communities and the management of schools. Towards finding possible ways to manage school violence, this article presents social networking as a strategic tool in the management of school-based violence in high schools, based on the results of a study carried out in the uMgungundlovu district of KwaZulu-Natal, South Africa. The study adopted a qualitative approach as a result of the interpretative nature of the causes of school-based violence in high schools. The sample of the study was made up of 18 participants and in-depth interviews were the main data collection instruments in the study. Content analysis using NVivo was employed in analysing data collected in the study. The study revealed how school managers employ social networking as information gathering tool and as a support mechanism in the management of school-based violence in high schools. The information gathered by school managers through social networking enable them develop intervention strategies in high schools that reduce school-based violence and create school climates that promote teaching and learning.