Dera Ismail Khan's 2026 population is now estimated at 221,865. In 1972, the population of Dera Ismail Khan was 58,778. Dera Ismail Khan has grown by 431 in the last year, which represents a 0.19% annual change. These population values and projections come from Pakistan cities census series 1972-1998 via CityPopulation official attribution, Pakistan cities census 2017 via CityPopulation official attribution, Pakistan cities census 2023 via CityPopulation official attribution and World Population Review Internal Projections .