Alahdadpur is a village in Lahladpur tehsil in district of Saran, Bihar, India. As per the data provided by Census of India in 2011, total population of Alahdadpur was 2,126 which includes 1,077 males and 1,049 females. Alahdadpur covers 70 ha area. Pincode of Alahdadpur is N/A.