A city is considered smart whenever investments are made in its people and social capital, traditional transport, and modern ICT infrastructure to enable sustainable economic growth, high quality of life, ecofriendly with organic cities and responsible resource management through participatory government. Globally, there are 88 organic smart cities, a four-fold rise from 21. By 2017, 178 towns, from Melbourne to Copenhagen to San Francisco, had launched 250 smart-city initiatives. The paper covered areas like history of smart city, characteristics and features of a Smart City, the pivotal components of a smart city, the level of implementation of some world’s organic smart cities like Singapore, Dubai, Moscow and Milan among others was also discussed. challenges smart of cities and ways to overcome them were also highlighted. Although there are many different ways to conceptualize a “smart city,” any project that succeeds will center on five essential areas in a thorough and integrated manner: the supporting infrastructure, city and community leadership structures, sustainable delivery of services, innovative and technological advancements, and civic amenities within the community