Kalajharna is a village in Gobindpur tehsil in district of Saraikela Kharsawan, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Kalajharna was 1,157 which includes 592 males and 565 females. Kalajharna covers 239 ha area. Pincode of Kalajharna is 831002.