Udrasar is a village in Sridungargarh tehsil in district of Bikaner, Rajasthan, India. As per the data provided by Census of India in 2011, total population of Udrasar was 3,583 which includes 1,872 males and 1,711 females. Udrasar covers 8216 ha area. Pincode of Udrasar is 331801.