Alsar Bas is a village in Ratangarh tehsil in district of Churu, Rajasthan, India. As per the data provided by Census of India in 2011, total population of Alsar Bas was 2,434 which includes 1,269 males and 1,165 females. Alsar Bas covers 2783.78 ha area. Pincode of Alsar Bas is 331802.