Bydgoszcz's 2025 population is now estimated at 338,761. In 1950, the population of Bydgoszcz was 160,046. Bydgoszcz experienced a decrease of -1,717 residents over the past year, marking an annual decline of -0.5%.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Bydgoszcz, which typically includes Bydgoszcz's population in addition to adjacent suburban areas.