The city of Rahim Yar Khan is one of the few cities in the world that are still at their pioneering places since the formation like London andDamascus. The surface of the desert consists of successions of sand dunes rising at places to a height of 150 meters and covered with the vegetation peculiar to sandy tracts. The part of the area is called Choulistan lies on the south of the irrigated tract up to the Indo-Pak border. The approximate height of the irrigated area is 150 to 200 meters above the sea level. The Canal irrigated area lies on the south and is separated by main Minchin Bund. The Reverie area of the district lies close on the southern side of the Indus River mainly falling on the riverbed. (c) Desert area which is called Choulistan. This district is divided into three main physical features i.e. Rahim Yar Khan is bounded on the north by Muzaffargarh district, on the east by Bahawalpur district, on the south by Jasilmair (India) and Ghotki district of Sindh province and on the west by Rajanpur district. All the Tehsils are Tehsil Municipal Administration (TMA). The district comprises four Tehsils namely Rahim Yar Khan, Sadiqabad, Liaquat Pur and Khan Pur. The total area of the district is 11,880 square kilometers. The Area of Rahim Yar Khan City is about 22 square kilometers. The district lies between 27.40′ - 29.16′ north latitudes and 60.45′ - 70.01′ east longitudes.
There are three municipal committees and five town committees in the district.
The district comprises four Tehsils namely Rahim Yar Khan, Sadiqabad, Liaquatpur and Khanpur.
Rahim Yar Khan is bounded on the north by Muzaffargarh district, on the east by Bahawalpur district, on the south by Jasilmir (India) and Ghotki district of Sindh province and on the west by Rajanpur district. Later Nawab Sadiq Khan-IV of Bahawalpur renamed it after his son Rahim Yar Khan. The previous name of this district was Naushehra which was built in 1875 by Fazal Elahi Halani on the ruins of the ancient Pul-Wadda during the Sumra rule in Sindh. The district derives its name from its headquarters Rahim Yar Khan. It was declared as a separate administration district in 1943. Rahim Yar Khan district is located in Punjab. Consequently in 1881 to avoid any confusion because of similar nomenclature, Nawab Sadiq Khan-IV of Bahawalpur changed the name of the sub-division Naushehra after the name of his first son crown prince Rahim Yar Khan. In the year 1881, the Railway Authorities desired to change the name of railway station in the name of a town called Nowshera situated in Peshawar district. The previous name of this city 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. The district derives its name from its headquarter city Rahim Yar Khan. Rahim Yar khan was declared as a separate administration district in 1943. As of January 2007, it is around 330,000. According to the 1998 census, the city population was 233,537 with an annual growth rate of 4.04%. Today, Rahimyar Khan lies on an important train route which runs south to Sukkur and north to Bahawalpur. Formerly Rahimyar Khan was also one of the names of the three districts of the former princely State of Bahawalpur until 1955.
In 1883 Nawab Sadiq Khan-IV of Bahawalpur renamed it after his son Rahim Yar Khan. 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 now Rahim Yar Khan. The city itself is administratively subdivided into 9 Union Councils and is one of the few cities in the world that are still at their pioneering places since the formation. Rahim Yar Khan is the capital city of Rahim Yar Khan District as well as the tehsil of the same name. Rahimyar Khan or Rahim Yar Khan (Urdu: رحیم یار خان) is a famous city in the south of Punjab (Pakistan).