Kalajharia is a village in Karma Tanr Vidyasagar tehsil in district of Jamtara, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Kalajharia was 924 which includes 473 males and 451 females. Kalajharia covers 138 ha area. Pincode of Kalajharia is 815352.