Jamunajharna is a village in Boarijor tehsil in district of Godda, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Jamunajharna was 1,158 which includes 587 males and 571 females. Jamunajharna covers 68 ha area. Pincode of Jamunajharna is 814147.