Toyama's 2025 population is now estimated at 405,849. In 1950, the population of Toyama was 104,974. Toyama experienced a decrease of -1,450 residents over the past year, marking an annual decline of -0.36%.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Toyama, which typically includes Toyama's population in addition to adjacent suburban areas.