Barmer is a district of western Rajasthan state, India. Barmer is the second largest district of Rajasthan. District headquarters is in the town of Barmer. The other major towns in the district are: Balotra, Guda Malani, Baytoo, Siwana, Jasol and Chohatan. Recently, a large onshore oil field has been discovered and made functional in Barmer district.
The name Barmer is derived from the ruler Bahada Rao Parmar (Panwar) or Bar Rao Parmar (Panwar) who is said to have founded the town in the 13th century, when it was named Bahadamer ("The Hill Fort of Bahada").
Barmer is located in the western part of the state forming a part of the Thar Desert. The district borders Jaisalmer district in the north, Jalore district in the south, Pali district and Jodhpur district in the east, and Pakistan in the west.
The total area of the district is 28,387 square kilometres (10,960 sq mi). The district is located between 24,58' to 26, 32'N Latitudes and 70, 05' to 72, 52' E Longitudes.