Gajdwahi is a village in Sasaram tehsil in district of Rohtas, Bihar, India. As per the data provided by Census of India in 2011, total population of Gajdwahi was 2,678 which includes 1,404 males and 1,274 females. Gajdwahi covers 327.8 ha area. Pincode of Gajdwahi is N/A.