Umdiangsiar is a village in Nongstoin tehsil in district of West Khasi Hills, Meghalaya, India. As per the data provided by Census of India in 2011, total population of Umdiangsiar was 107 which includes 57 males and 50 females. Umdiangsiar covers N/A area. Pincode of Umdiangsiar is 793119.