Barmer District is a district in Rajasthan state of India. It is located in the western part of Rajasthan state forming a part of the Thar Desert. Barmer is the third largest district by area in Rajasthan and fifth largest district in India, occupying an area of 28,387 km². Being in the western part of the state, it includes a part of the Thar Desert. Jaisalmer is to the north o…Barmer District is a district in Rajasthan state of India. It is located in the western part of Rajasthan state forming a part of the Thar Desert. Barmer is the third largest district by area in Rajasthan and fifth largest district in India, occupying an area of 28,387 km². Being in the western part of the state, it includes a part of the Thar Desert. Jaisalmer is to the north of this district while Jalore is in its south. Pali and Jodhpur form its eastern border and it shares a border with Pakistan in the west. Partially being a desert, this district has a large variation in temperature. The temperature in summer can rise up to 51 °C and falls near to 0 °C in winter. Luni is the longest river in Barmer district. After travelling a length of almost 500 km, it passes through Jalore and merges in the marshy land of Runn of Kutch. District headquarters is in the town of Barmer. The other major towns in the district are: Balotra, Guda Malani, Baytoo, Siwana, and Chohatan. Recently, a large onshore oil field has been discovered and made functional in Barmer district. Barmer is also famous for pomegranate.