Laixi's 2021 population is now estimated at 523,107. In 1950, the population of Laixi was 3,116. Laixi has grown by 17,990 since 2015, which represents a 3.56% 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 Laixi, which typically includes Laixi's population in addition to adjacent suburban areas.