Religious pluralization in line with participatory policy approaches has led to a new field of cooperative governance of religious diversity. This article explores the collaboration between state and (inter-) religious actors in two metropolitan regions in Germany, namely Hamburg and Rhine-Ruhr. Drawing upon qualitative fieldwork, this article provides a systematic analysis of discursive and structural measures of state-interfaith governance in the two regions. It clearly shows that state-interfaith governance gains in importance and is practiced in various forms depending on the contextual setting. Based on this, comparative case analysis shows that state-interfaith governance in Germany is characterized by (1) a prominent role of the established churches; (2) a potential of accommodating religious diversity which is, however, restricted by a narrow orientation of the world-religion model and the predominant focus on Islam; and (3) takes place in a complex multi level setting which calls for further investigation.