Depalpur city is an ancient city about 2000 years old, the city has been demolished and rebuilt several times during this period. According to the historian Abnashi Chander Das "AC DAS", the original name of this city was Siri Puria or Siri Nagar after the elder brother of Raja Salvahan of Sialkot (who was the explorer of Sialkot) Raja Depa Chand renamed Depalpur after his beloved son Raja Depa. According to A C DAS, that was about 2000 years ago when Aryans entered the Subcontinent they began to live in the land of Pert Sindhu (The Land of Seven Rivers) including River Ravi, Chinab, Satluj, Jhelum, Beas, Indus and Kabul. So the famous civilisation which was developed at that time was Ajodhan (Pakpattan), Qabula and Depalpur. Now the Depalpur is a tehsil of district Okara and it is an older tehsil than Okara. This area also remained the part of Montgomery District before 1982 when Okara became a district.it contains 945 villages.

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