Nasriganj is a nagar panchayat town and corresponding community development block situated in Rohtas District of Bihar, India. Located on the banks of the Son River, the town was a vibrant economic hub in the late 19th century. The town of Nasriganj had a population of 23,819, according to the 2011 Census of India, while the total population of Nasriganj block was 115,117. Besides the town of Nasriganj itself, the block consisted of 53 villages, of which 50 were inhabited and 3 were uninhabited. Name Nasirganj takes its name from a Sufi name Mir Nasir Dehlavi, who came to the village in late 19th century. His mausoleum is situated at the center of Nasriganj. History The town of Nasriganj dates back to 1740, when the eponymous Abdul Nasir settled here on the Arrah-Sasaram road. Nasriganj was formerly ruled by a local native dynasty. In 1867, the last ruler died without heirs, and the estate escheated to the British government. At this time, it was an important commercial and manufacturing centre, with 21 paper mills and 42 sugar refineries. It lost much of its importance in the ensuing years, and was downgraded from town to village status, but by 1921 it was still described as a notable trade centre, along with nearby Hariharganj. At that time, it possessed a large turbine-powered mill that produced oil, sugar, and flour, and paper was still manufactured on a smaller scale. The population of Nasriganj in 1921 was 5,332. Nasriganj was raised to nagar panchayat status in 2011. Economy Today, the main commodities manufactured in Nasriganj are blankets, furniture, and bricks. There is a market place named Izhar Market in downtown Nasriganj. This is a big market considering population of the village having more than 30 shops. This market is a big attraction for people coming from nearby villages. Apart from this market, there some more attractions for people nearby. There is a big vegetable and food grain market and produces like potatoes, rice and gur are exported from this market. Beside this there is mini hydro power station on canal. There is one post office, telephone exchange and Nasriganj police station under Dy.S.P. There are more markets in Nasriganj such as Aslam Market. The main occupation of people of Nasriganj is fishing. This whole area has some of the most fertile land of the country and is very well irrigated through a canal network