Renqiu's 2021 population is now estimated at 664,262. In 1950, the population of Renqiu was 3,129. Renqiu has grown by 23,991 since 2015, which represents a 3.75% 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 Renqiu, which typically includes Renqiu's population in addition to adjacent suburban areas.