Daudnagar is an important city located in the Aurangabad District of the Indian state of Bihar. It is 32 km northwest of Aurangabad, on the banks of the Son River. It is located at an altitude of 84 metres above mean sea level. Daudnagar is a municipality town which is looked after by the local administration. Excursion to Gaya, 66 km to the east of Daudnagar, is a tourist attraction.

Demography of Daudnagar
According to the 2001 census report, Daudnagar had a population of 52,364 inhabitants where males constitute 52% of the population and females constitute 48%. In Daudnagar, 18% of the population are less than 6 years of age. Daudnagar has an average literacy rate of 66% which is higher than the average literacy rate which is 59.5%. The male literacy rate is 71% while the female literacy rate is 61%.

Historical Significance of Daudnagar
Daudnagar has old historical fort. Generations of king Daud Khan's are settled there. This fort is situated on the eastern bank of the Son River and was founded by Daud Khan, a Governor of Bihar under Aurangzeb in the 17th of Palamou fort from the Cheras; and it is said that while back from this conquest he camped here and founded the town known after him. The surrounding area was also granted to him as a Jagir by the emperor.

Early in the 18th century Buchanan saw it as a flourishing town with cloth and opium factories. The sarai built by Daud Khan was, perhaps really meant to be a stronghold; for it was well fortified with a battlemented wall, two large gates and a moat all around. It was called as a sarai probably to avoid jealousy of the Government. The sarai was in good condition till a few years before 1896; for the Bengal list says that the gates were regularly shut every night. Ahmad Khan, grandson of Daud Khan, fortified the town which was then named as Ghausipur. The town also contains an old mosque and another sarai built by Ahmad Khan, which had mud gates. In the outlying part of the town called Ahmadganj is the tomb of Ahmad Khan.

Transportation of Daudnagar
State Highway 2 passes through the town. The town has good connectivity, the nearest airport is the Gaya Airport and the nearest railway station is the Son Nagar railway station.