Miyazaki's 2025 population is now estimated at 394,714. In 1950, the population of Miyazaki was 76,703. Miyazaki experienced a decrease of -886 residents over the past year, marking an annual decline of -0.22%.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Miyazaki, which typically includes Miyazaki's population in addition to adjacent suburban areas.