Birbanki is a village in Erki tehsil in district of Khunti, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Birbanki was 2,681 which includes 1,346 males and 1,335 females. Birbanki covers 1928.29 ha area. Pincode of Birbanki is 835216.