The circular economy has gained in popularity because its basic principles, such as designing out waste and pollution, keeping products and materials in use, and regenerating natural systems, can be applied at various scales, and the potential benefits are broad. Considering the core competencies of municipal governments, cities can play a well-rounded role in the circular economy by promoting the circular economy and acting as a role model, facilitating connections and establishing multi-level governance to align priorities and policy coherence, enabling appropriate governance conditions by mobilizing resources, adapting regulatory frameworks, and advancing public procurement and information systems.