Chak Alahdad is a village in Sarairanjan tehsil in district of Samastipur, Bihar, India. As per the data provided by Census of India in 2011, total population of Chak Alahdad was 1,562 which includes 832 males and 730 females. Chak Alahdad covers 116 ha area. Pincode of Chak Alahdad is N/A.