| 119,057 (2001)|
Bhojpuri, Hindi, Urdu
Dehri, also known as Dehri on Sone, is city and a municipality in Rohtas district in the state of Bihar, India on NH 19 (old number NH 2) which passes between the city, East face lying on the bank of Son River which open its wide face here after passing between mountains with the 3 Longest Railway and 2 Road bridges of india with a Beautiful Indrapuri Dam on it, where as south face is covered by beautiful Kaimur mountains
According to the 2011 Census, Dehri had a population of 137,231. Males population is 72,372 and females population is 64,859. Dehri has an average literacy rate of 81.2%, higher than the national average of 74%. Male literacy is 87.54% and female literacy is 74.08%. Population of children in age group 0–6 years is 19,010, of which male population is 9,886 and female population is 9,124.
The Longest Railway bridge in India lengths 3.065 km over Sone River which links Sone Nagar and Dehri popularly known as Sone Bridge. The motor bridge is also built with similar length on NH2.