Regahia is a village in Nichlaul tehsil in district of Mahrajganj, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Regahia was 2,468 which includes 1,257 males and 1,211 females. Regahia covers 213.99 ha area. Pincode of Regahia is 273304.