The utilization of plastics has now become a threat to the environment as it generates microplastic particles (< 5 mm in size). The increasing studies on the occurrence of microplastics in different environmental compartments have raised concern about the potential effects on ecosystems and living organisms . Of these, numerous studies are focused on marine environments . The occurrence of microplastics is recently extended to the freshwater environments, including river systems, streams, lakes, pond, creek, and estuarine rivers . This paper overviews the current knowledge and research findings on the occurrence of microplastics in water, sediment, and fish in freshwater environments . The review also covers the adopted methodology and impacts of microplastics to the ecosystem . Future perspectives are discussed as well in this review.