Laixi's 2025 population is now estimated at 584,904. In 1950, the population of Laixi was 3,116. Laixi has grown by 13,494 in the last year, which represents a 2.36% 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.