The aim of this research work is to design a smart city simulator. The proposed simulator contains the 3D model of several locations of the city with each location equipped with multiple types of virtual sensors node. The virtual sensors mainly include Noise Sensor, Air Pollution, Ultrasonic Sensor, Humidity Sensor, Temperature Sensor and Video Camera. These sensors continuously monitor and collect the data from the environment and upload it to a public cloud for further analysis through virtual gateway node. The virtual gateway node provides communication of sensors node with virtual cloud hosted server. In addition, the proposed simulator also provides a mapping interface that aids to integrate the physical sensors with the virtual sensors of the 3D model. This will benefit the visualization of physical level environment on the 3D model of the smart city simulator at the same time. © 2017 IEEE.