ABSTRACT This research was conducted in October 2021. The research location is located in the Koto Panjang Reservoir area. This study aims to determine the content of microplastics in 5 types of fish in the Koto Panjang Reservoir, Kampar Regency, Riau. The method used in this research is a survey method. The object of the research was samples of the stomach and intestines of 5 types of fis…