This paper presents an overview of power electronics techniques used in electric systems for transport applications, including more-electric aircraft (MEA), electric ship (ES), and electric vehicle (EV). As the worldwide economy is continuously increasing, there is more demand for transportation, which is one of the most significant sources of carbon emissions. In order to achieve the target of low greenhouse gas (GHG) emission rate and ultimately realize sustainable development, the concept of using electric systems to replace the other types of systems that utilize conventional energy resources such as fossil fuels. The subsystems utilizing hydraulic, mechanical, and pneumatic power that were previously used in conventional airplanes are replaced by electrical systems in MEA, which reduces the fuel consumption, operating cost, and noise of aircrafts. Besides, in ES applications, by applying electric propulsion systems, the negative impacts caused by using long shaft-lines to the propellers can be eliminated since the flexibility of on-board equipment placement is obtained. Additionally, the concept of EV is becoming popular in the automobile industry due to the stringent constraints on energy resources and environmental concerns. In order to learn about the research interests and trends in power electronics techniques for these more- or all-electric transport applications, a review is carried out in this paper