Sixth International Istanbul Smart Grids and Cities Congress and Fair (ICSG 2018) technically sponsored by the IEEE Power & Energy Society (IEEE-PES), will be held on 25-26 April 2018 at Istanbul Congress Center, Istanbul, Turkey. The annual ICSG 2018 is a leading international event on smart grids and smart cities. ICSG 2018 seeks to bring together researchers, practitioners, developers, and users to explore and discuss cutting-edge ideas and results, and the state-of-the-art innovations and to exchange techniques, tools and experiences. Organizing committee invites researchers, innovators, practitioners, decision makers, regulators, investors, experts, and students to participate and submit their papers. Industrial representatives and exhibitors are invited to take a place in stands and join to scientific and bilateral business meetings. All submissions must be original and should not have been published previously.