This paper examines legitimacy and political space for civil society in violent and divided contexts. It draws on qualitative fieldwork with civil society groups in Burundi, where government restrictions and political violence have increased in recent years. However, not all civil society groups experienced these pressures in the same way, and some were more vulnerable to restrictions than others. This paper asks why and considers whether civil society legitimacy can help to explain some of these differences. In doing so, it develops a more nuanced understanding of the relationship between legitimacy and political space, and processes of legitimation and delegitimation in violent and divided contexts. The paper finds that the experiences of civil society groups in Burundi prior to the 2015 elections not only related to their organisational legitimacy, but also the extent to which they were perceived to challenge the political legitimacy of government elites.