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.