Didwana (Rajasthani: डीडवाना) is a town in Nagaur district of Rajasthan in India, in the Thar Desert. It is thought to be more than 5,000 years old. The name 'Didwana' is considered as stumbled name of 'Deen Deewana'. The land is known for the 'Deen Deewana' (Loopy for Islam). Later it converted in to 'Deedwana' and 'Didwana'. The India Post Department still quotes the name and stamp as 'Deedwana'.Nowadays Didwana is a well-known town of Nagaur/Rajasthan.