Allahapur is a village in Domariyaganj tehsil in district of Siddharthnagar, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Allahapur was 958 which includes 499 males and 459 females. Allahapur covers 40.81 ha area. Pincode of Allahapur is N/A.