Liege's 2025 population is now estimated at 688,582. In 1950, the population of Liege was 602,056. Liege has grown by 2,059 in the last year, which represents a 0.3% 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 Liege, which typically includes Liege's population in addition to adjacent suburban areas.