This article challenges the conventional wisdom that enthusiastic state support is a prerequisite to building strong participatory institutions. Through an analysis of Colombia’s planning councils, this study develops the concept of the societydriven participatory institution, in which civil society actors, rather than the state, undertake the core tasks involved in implementing participatory institutions. The article argues that while state neglect limits their involvement in decisionmaking, society-driven participatory institutions can still develop important policymaking roles in agenda setting and in monitoring and evaluating public policy.