వైశాల్యపరంగా జైసల్మేర్ జిల్లా రాష్ట్రంలో మొదటి స్థానంగానూ దేశంలో మూడవ స్థానంలోనూ ఉంది. జైసల్మేర్ జిల్లా థార్ ఎడారిలో (థార్ ఎడారి పాకిస్థాన్ సరిహద్దు వరకు విస్తరించి ఉంది) ఉంది.
Jaisalmer District lies in the [[Thar Desert]], which straddles the border of India and [[Pakistan]]. It is bounded on the northeast by [[Bikaner District]], on the east by [[Jodhpur District]], on the south by [[Barmer District]], and on the west and north by [[Pakistan]].
The district is located within a rectangle lying between 26°.4’ –28°.23' North parallel and 69°.20'-72°.42' east meridians.
The length of international border attached to the district is 471 km.
Jaisalmer is almost entirely a sandy waste, forming a part of the great Indian desert. The general aspect of the area is that of an interminable sea of sandhills, of all shapes and sizes, some rising to a height of 150 ft. Those in the west are covered with log bushes, those in the east with tufts of long grass. Water is scarce, and generally [[brackish]]; the average depth of the wells is said to be about 250 ft. There are no perennial streams, and only one small river, the [[Kakni]], which, after flowing a distance of 28 m., spreads over a large surface of flat ground, and forms a lake [[orjhil]] called the [[Bhuj-Jhil]]. The climate is dry and healthy. Throughout Jaisalmer only raincrops, such as [[Pearl millet|bajra]], [[joar]], motif, [[til]], etc., are grown; spring crops of wheat, [[barley]], etc., are very rare. Owing to the scant rainfall, [[irrigation]] is almost unknown.