Rupai Siding is a fast developing township situated in the district of Tinsukia in Assam,(in North East) India. It was a small village about 50 years ago, which is now the Industrial Township having Tea Factories and Other Allied Industries.It is said that it had one of the oldest railway tracks until few years back which was used by the Britishers to transport goods and materials. This railway track connected Dibrugarh to Dangari and runs through Rupai and hence it is a siding and came to be known as RUPAI SIDING.