DINAPORE, a subdivisional town and cantonment of British India, in the Patna district of Behar and Orissa, on the right bank of the Ganges. Pop. (1931) 81,367. In 1857 the sepoy regiments here who had been allowed to retain their arms broke into open mutiny when an attempt was made to disarm them. The majority crossed over the Son into Shahabad where they joined the rebels under Kuar Singh and laid siege to Arrah.