Zinder's 2025 population is now estimated at 631,672. In 1950, the population of Zinder was 12,466. Zinder has grown by 30,711 in the last year, which represents a 5.11% annual change.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Zinder, which typically includes Zinder's population in addition to adjacent suburban areas.