How do state-recognized traditional authorities (TAs) influence local-level stability? Policies that recognize and give TAs public authority, particularly in many sub-Saharan African countries, have attracted growing scholarly interest in TAs. Drawing empirical evidence from South Africa, I test a proposition that internally contested TA structures contribute to grievances and opportunities that give rise to social unrest. The statistical analysis combines spatial data on municipality-level protests with new data on contested and uncontested TA structures. The results support the theoretical argument. Qualitative data further demonstrate how contested TAs fuel grievances and facilitate mobilization against the local authorities.