Umahalangso is a village in Donka tehsil in district of Karbi Anglong, Assam, India. As per the data provided by Census of India in 2011, total population of Umahalangso was 273 which includes 130 males and 143 females. Umahalangso covers 80 ha area. Pincode of Umahalangso is 782486.