On 17 March 2016 the Kurdish Democratic Union Party (Partîya Yekîtî ya Dêmokrat, PYD) unilaterally proclaimed the Democratic Federation of Northern Syria in three cantons, Afrin and Kobane in northern Aleppo province, and Jazira in Hassakeh. The party's ideology claims to endorse the participation of civilians and certain Arab tribes and minorities in its governance councils. However, the PYD and its armed militia, the People's Protection Units (Yekîneyên Parastina Gel, YPG), have been accused of committing human rights violations against civilians and installing one-party rule. Given its stated normative commitments and ideas on democracy, this ideology–practice gap begs the question: what factors facilitated the PYD to conform to its democratic pronouncements on power-sharing and inclusivity under certain conditions and, conversely, what factors permitted their abandonment or violation? By analysing the PYD's governance record and strategies in northern Syria between 2012 and 2018, this article argues that the PYD displayed a mix of democratic adherence and transgression in its governance practices. This has meant that the PYD engaged hybrid mechanisms of democracy-building, coercion, displacement and violence in order to consolidate territorial control and assert ideological hegemony. I argue that complex networks of local, state and third-party interests complicate Kurdish self-rule in Syria, requiring a multilevel approach to understand the interrelated challenges to democratization in the post-war transition. I identify four major types of relations that have influenced the PYD's hybrid governance practices: intra-organizational factionalism; civilian–rebel relations, especially in mixed demographic areas; international sponsors and rivals; and rebel–regime relations.