Jalasar is a village in Bandgaon tehsil in district of Pashchimi Singhbhum, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Jalasar was 942 which includes 487 males and 455 females. Jalasar covers 1089 ha area. Pincode of Jalasar is 833201.