Ajmer District has an area of 8,481 km², and a population of 2,180,526 (2001 census). Three main religions are; Hindu 1,869,044, Muslim 244,341, Jains 47,812. The district is situated in the center of Rajasthan, and is bounded by Nagaur District to the north, Jaipur and Tonk districts to the east, Bhilwara District to the south, and Pali District to the west.
The eastern portion of the district is generally flat, broken only by gentle undulations. The e western parts, from north-west to south-west, are intersected by the Aravalli Range. Many of the valleys in this region are sandy deserts, part of India's Thar Desert, with an occasional oasis of cultivation. Some fertile tracts are also present; among these is the plain on which lies the town of Ajmer. This valley has an artificial lake, and is protected by the massive walls of the Nagpathar range or Serpent rock, which forms a barrier against the sand. The only hills in the district are the Aravalli Range and its offshoots. Ajmer is almost totally devoid of rivers. The Banas River touches the south-eastern boundary of the district so as to irrigate the pargana of Samur. Four small streams—the Sagarmati, Saraswati, Khari and Dai—also intersect the district.
The district is divided into four subdivisions, Ajmer, Beawar, Kekri and Kishangarh, and further subdivided into nine tehsils, Ajmer, Beawar, Bhinai, Sarwar, Sawar, Tantoti, Nasirabad, Masuda, Kekri, Kishangarh.
According to the 2011 census Ajmer district has a population of 2,581,933. This gives it a ranking of 161st in India (out of a total of 640). The district has a population density of 305 inhabitants per square kilometre (790/sq mi) . Its population growth rate over the decade 2001-2011 was 18.48%. Ajmer has a sex ratio of 950 females for every 1000 males, and a literacy rate of 70.46%.
- "District Census 2011". Census2011.co.in. 2011. Retrieved 2011-09-30.
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||Nagaur district||Jaipur district|
|Pali district||Tonk district|
|Rajsamand district||Bhilwara district|