This paper brings together a number of case studies on how cities from the UK and beyond are becoming ‘smart’. UK cities need to provide public services more efficiently while at the same time supporting sustainable and long term economic growth. The best way to do so is by becoming ‘smart’. This generally means using new technologies and data to improve service delivery and address various economic, social and environmental challenges. Cities can deliver a smart agenda by integrating economic development and public services delivery, focusing on projects that are practical, achievable and financially viable and consulting with citizens and businesses on their needs. The following case studies show how cities are improving service delivery and supporting growth using new technologies.