Rahim Yar Khan (رحیم یار خان) is a famous city in the south of Punjab (Pakistan). It is the capital city of Rahim Yar Khan District as well as the tehsil of the same name. Rahim Yar Khan is one of the few cities in the world that are still at their pioneering places since the establishment. It has been renamed customarily amid last 5000 years, first available (on record) name was AROR or ALOR, and then it became City of Pattan, Phul Wada,  Noshehra and Rahim Yar Khan.

When Alexander gained victory over Multan, he appointed General Philipos to rule Multan and Uch and advanced himself towards Alor. The country remained under Philops, who was afterwards driven out by Poros after the death of Alexander. This part of the country is also said to have been a part of the Buddhist Empire of Ashoka. Authenticated history of the district begins by about 493 A.D. when Raja dynasty of Rai dynasty came to the throne. In the Rai dynasty dominions were vast, extending from Kashmir and Kanauj to Kandhar and Seistan and on the west to Mekran and a part of Debal, while on the south to Surat.

Their capital was Alor and during their rule Sindh was divided into four provinces of Bahmanabad, Siwistan, Chachpur and the province consisting of Multan and west Punjab. The Rai dynasty governed Sindh for 137 years and met its fate when the king Rai Sahasi 11, allowed a Brahman Chach to gain influence in his kingdom. On the death of Rai Sahasi 11, Chach married his widow and established himself on the throne after killing the rightful heir of the Rai.

Rahim Yar Khan was declared as a separate administration district in 1943. The district derives its name from its headquarter Rahim Yar Khan. The previous name of this district was Naushehra, which was built in 1875 A.D by Fazal Elahi Halani on the ruins of the ancient Pul-Wadda during the Sumra supremacy in Sindh. In the year 1881, the Railway Authorities desired to change the name of a railway station in the name of a town called Nowshera situated in Peshawar district. Consequently in 1881 to avoid any confusion because of similar nomenclature Nawab Sadiq Khan-IV of Bahawalpur also changed the name of the sub-division Naushera after the name of his first son Rahim Yar Khan. Formerly Rahim Yar Khan was also one of the names of the three districts of the former princely State of Bahawalpur until 1955. Today, Rahim Yar Khan lies on an important train route, National Highway and CPEC Motorway.