Tongchuan's 2021 population is now estimated at 556,484. In 1950, the population of Tongchuan was 109,631. Tongchuan has grown by 9,835 since 2015, which represents a 1.80% 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 Tongchuan, which typically includes Tongchuan's population in addition to adjacent suburban areas.