Iquitos's 2026 population is now estimated at 511,333. In 1950, the population of Iquitos was 42,314. Iquitos has grown by 6,724 in the last year, which represents a 1.33% 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 Iquitos, which typically includes Iquitos's population in addition to adjacent suburban areas.