This book presents the most important standards that have derived for smart cities and starts from the international and supranational levels and proceeds with the most important national approaches. Standardization is the process that follows innovation and attempts to put quality rules to competitive products of the same domain. Especially for smart cities, standardization has helped the scholars define and conceptualize this complex domain. The purpose of this book is threefold: first, to present the current state of smart city standards at both international and national levels and help practitioners and theorists understand its context and available solutions. Second, to demonstrate how the smart city innovation is clarified via standardization and how competitive solutions compromise under international and national negotiations in standardization bodies. Finally, the book contains some cases that applied specific smart city standards. The contribution of this book is strong, due to the numerous existing standards that have emerged for smart cities and make their understanding and realization a complex process. These standards both clarify the smart city domain but, more importantly, aim to homogenize the emerging intelligent solutions that cover the broad smart city scope, ranging from transportation and buildings to platforms, resilience, and tourism. This book is a valuable resource for researchers, practitioners, and students who work in smart cities and in standardization.