Nijkajra 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 Nijkajra was 593 which includes 299 males and 294 females. Nijkajra covers 117.12 ha area. Pincode of Nijkajra is 815352.