This Special Issue will collect and highlight recent work in smart cities. We are inviting reviews, regular research papers (articles), and communications in all areas of research concerning smart cities. Topics include, but are not limited to the following: Electrical engineering for smart cities: smart grids, smart buildings, smart homes, smart lighting, renewable energies, and power electronics for smart cities; Computer engineering and information technology engineering for smart cities: ICT infrastructure and information management in smart cities, IoT architectures, protocols, and algorithms, IoT device technologies, IoT network technologies, cloud computing, autonomic computing, data management, intelligent data processing, and big data management for smart cities, real-time, and semantic web services, context-aware systems for smart cities; Cyber-physical systems for smart cities; Virtual reality for smart cities; Smart hospitals and health informatics for smart cities: smart health, e-health, digital health, telehealth, telemedicine; Transport and mobility: intelligent transportation systems and vehicular networks, smart mobility, smart parking, traffic congestion, city logistics, people mobility; Electronics, telecommunication, and measurements engineering for smart cities: networks and communications, advances in smart grid sensing, sensor interface, and synchronization in smart grids, multisensor data fusion models for smart grids and smart cities, traceability and calibration of distributed sensing grids, distributed and networked sensors for smart cities, wireless sensor networks, embedded sensing and actuating, radio frequency identification (RFID), mobile internet, ubiquitous sensing; Civil engineering for smart cities: smart city architecture and infrastructure, environmental engineering for smart cities, smart water management, sustainable districts and urban development, waste management for smart cities, smart agriculture, greenhouses; Weather analysis, forecasting, reporting, and flood management for smart cities; Mechanical sciences and automobile engineering for smart cities; Applied science and humanities for smart cities; Retail for smart cities: supply chain control, NFC Payment, intelligent shopping applications, smart product management, etc.; Security, privacy, and emergencies in smart cities, cryptography, identity management; Smart living: pollution control, public safety, healthcare, welfare and social innovation, culture, public spaces; Smart urban governance and e-government for smart cities; Business and social issues for smart cities: smart economy and business model innovation in smart cities, marketing strategies for firms offering new services in smart cities; Experimentation and deployments: real solutions, system design, modeling and evaluation for smart cities, pilot deployments, performance evaluation; Trends and challenges in smart cities; Intelligent transportation systems, multimodal traffic to improve mobility; Industry 4.0 challenges and opportunities in smart city/smart region development.