Arwal district is one of the thirty-eight districts of Bihar state, India, and Arwal town is the administrative headquarters of this district. It was earlier part of Jehanabad district.

As of 2011 it is the third least populous district of Bihar (out of 39), after Sheikhpura and Sheohar.

The district is infested with Naxalites, which is one factor that hampers growth of the area besides lack of infrastructure and power. Communism is yet another factor where there is always a tussle between high class and low class of society. There had been a very heinous massacre of Dalit people at Laxmanpur Bathe in 1997. It is currently a part of the Red Corridor.

Arwal district occupies an area of 637 square kilometres (246 sq mi), comparatively equivalent to Canada's Foley Island.

Arwal is the unique district of Bihar in the sense of quality of water and its greater availability .As per survey done by the experts underground water of arwal is completely free from the impurities.Water is available at most of the place at much shallower depths this is the reason why most of the households of arwal used to install handpumps in stead of motors snd storage.Excellent transportation,Son river and huge availability of water in Arwal may provide suitable conditions to establishment of industries.

Arwal town is the administrative headquarters of Arwal district in Bihar state of India. It was earlier part of Jehanabad district. Arwal has a population of 588,000. Arwal, the district headquarter is situated at approximately 80 km south from the state capital Patna. Arwal town is situated on the right side bank of the river Son, which is a tributary to the river Ganges.

Arwal district is a part of Magadh division. It came into existence in September 2001 and was earlier part of Jehanabad district.

The five block divisions are Arwal, Kaler, Karpi, Kurtha and Suryapur Vanshi.

Arwal is located at 25°15′N 84°41′E / 25.25°N 84.68°E / 25.25; 84.68. It has an average elevation of 67 metres (220 ft). The district headquarters is in arwal near river (SONE). The state capital, patna is 65 km to the north. The rural area dominates and the soil is productive, so farmers harvest paddy crops mainly and also rabbi.BAJITPUR is one of the nice village of arwal

In March 2008 the Bihar government approved the construction of a bridge across the Son River at a cost of Rs. 9,742 lakhs from Arwal to Sahar in Bhojpur district. The economy of Arwal depends on agriculture only. Most of the population resides in villages and are farmers. The entire district is well irrigated due to the proper arrangement of canals. There is no existence of any industry or other business centre.