The city was founded at the close of the 15th century and named after Ghazi Khan, son of Haji Khan, a Balochi chieftain, who had declared independence from the Langhi Dynasty Sultans of Multan. Together with two other Deras i.e. settlements, Dera Ismail Khan and Dera Fateh Khan, it gave its name to Derajat. Derajat eventually came into the possession of the British after the Sikh War in 1849 and was divided into two districts: Dera Ghazi Khan and Dera Ismail Khan. After the partition of India, many of the city's HinduDerawal Nagar colony of Delhi, India.The district of Rajanpur was later carved out of the Dera Ghazi Khan district. Some of them also settled in various part of India, including Bhiwani, Delhi, Jhansi, Ranchi, Ambala and Haridwar. residents settled in
Dera Ghazi Khan was founded in 15th century by Ghazi Khan a Tribal Sardar of Mirani Tribe. The old city of Dera Ghazi Khan was situated at the distance of 10 miles towards east of the present city. In 1908, the old city of Dera Ghazi Khan was abolished due to heavy flood in the river Indus. Resultantly the existing city of Dera Ghazi Khan was came into being in the year 1910. The city is divided into different blocks. The British ruler established colonial system in the continent and declared D.G.Khan as district in the year 1849. General Court Land was appointed as first Deputy Commissioner of this District. Keeping in view the rapidly increasing population of the area and deteriorating law and order situation district D.G.Khan was divided in two districts i.e. D.G.Khan and Rajanpur. Presently there are two revenue sub division of the District. A tribal belt/political area spread along with western side of the District.