Gangarjaflong is a village in Dotoma tehsil in district of Kokrajhar, Assam, India. As per the data provided by Census of India in 2011, total population of Gangarjaflong was 1,268 which includes 624 males and 644 females. Gangarjaflong covers 208.97 ha area. Pincode of Gangarjaflong is 783346.