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 Udmara Block was 361 which includes 194 males and 167 females. Udmara Block covers 34.34 ha area. Pincode of Udmara Block is 786110.