Maragusan, officially the Municipality of Maragusan, is a municipality in the province of Davao de Oro, Philippines. According to the 2020 census, it has a population of 64,412 people. The area in what is now Maragusan is a valley that in the past were inhabited solely by native Mansakan people who made their living by engaging in slash-and-burn agricultural practices. They identified themselves as “Man-Agusan” which means those living on the banks of the Agusan River which had its source within the boundaries of the present municipality.