The idea of the commons has a long historical and intellectual lineage ranging from the enclosure movement in England, to Garrett Hardin’s famous Tragedy of the Commons parable, to Elinor Ostrom’s Nobel prize-winning work on governing common pool resources. More recently, scholars across an array of specialties have conceptualized and articulated new kinds of commons, including knowledge commons, cultural commons, infrastructure commons, and neighborhood commons, among others. How should we conceive of the “urban commons” and what utility does the idea of the “commons” bring to the urban arena? What resources and services are or should be conceived as “urban commons? How do they emerge or get produced? At what scales?