This book explores the potential of 5G and beyond technologies in smart city setup, as it offers high bandwidth and performance, and low latency. It starts with an introduction to 5G along with challenges, limitations, and research areas in future wireless communication including related need for transformation in societal paradigm and infrastructure requirement. Applications related to Visible Light Communication, network management in smart cities, role of 5G in public healthcare, safety, security, and transportation, and existing and planned 6G research framework are included.