Siyalmari is a village in Sissibargaon tehsil in district of Dhemaji, Assam, India. As per the data provided by Census of India in 2011, total population of Siyalmari was 31 which includes 18 males and 13 females. Siyalmari covers 44.46 ha area. Pincode of Siyalmari is 787058.