Viseu is a municipality located in the state of Pará in northern Brazil. The city sits at an altitude of 15 meters above sea level and covers an area of 4,972.897 square kilometers, making it a geographically expansive municipality. According to IBGE estimates, Viseu had a population of approximately 62,093 inhabitants in 2021, resulting in a population density of 12.57 inhabitants per square kilometer.
The relatively low population density indicates that Viseu remains sparsely populated despite its large territorial extent, a characteristic common to many municipalities in the Amazon region of Pará state. As a municipality in Brazil's northeastern portion of the Amazon basin, Viseu's economy and development are shaped by the region's natural environment and infrastructure challenges typical of remote Amazonian areas.