The urban forest, i.e. the stock of urban trees, is a major component of urban green spaces. It can make significant contributions to urban sustainability and climate change adaptation. Urban forest governance and management play a key role in the extent to which these contributions are realized for good. This chapter presents a selection of promising new technologies in support of urban forestry. Techniques and applications are introduced in the domains of remote sensing, modeling and citizen science. These technology-driven developments offer new potentials for ‘smart’ urban forestry but may also create new risks of a shift towards techno-managerialism as opposed to more open and democratic processes.