Dehri also known as Dehri-on-Sone is a Nagar parishad and corresponding community development block in Rohtas district in the state of Bihar, India.

Situated on the banks of Sone River,[2] Dehri is a railway hub, and is adjoining Dalmianagar that used to be an industrial town.

The population of children in age group 0–6 years was 19,010, of which boys were 9,886 and girls 9,124.

Important industries in Dehri include sawmilling and ghee processing.

[2] Other important commodities include plastic pipes, light bulbs, and shoes.