DIBRUGARH, a town of British India, headquarters of the Lakhimpur district of Assam, on the Dibru river about 4 m. above its confluence with the Brahmaputra. Pop. (1931) 18,734. It is the terminus of steamer navigation on the Brahmaputra, and also of a railway line, which connects with the Assam-Bengal system. The town contains a cantonment, the headquarters of the Assam Valley Light Horse and various educational institutions. In 190o a medical school was established from a bequest by J. Berry White, to train hospital assistants for the tea gardens.