In this study, a dynamic simulation model for electric vehicle (EV) diffusion is constructed. The objective of this work is to investigate two main questions; what are the plausible diffusion patterns of electric vehicles for Istanbul under different scenarios developed considering both local and global socio-economic, governmental, technological factors and their interaction with each other? Secondly, what is the extent of the diffusion rate that can be expected in Istanbul after three decades? The model is validated by standard structure and behavior tests.