No 1 Udmara Block 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 No 1 Udmara Block was 14 which includes 7 males and 7 females. No 1 Udmara Block covers 108.49 ha area. Pincode of No 1 Udmara Block is 786110.