Nadiawan is a village in Ramgarh Chowk tehsil in district of Lakhisarai, Bihar, India. As per the data provided by Census of India in 2011, total population of Nadiawan was 2,502 which includes 1,295 males and 1,207 females. Nadiawan covers 311.2 ha area. Pincode of Nadiawan is N/A.