Gardahiya 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 Gardahiya was 2,842 which includes 1,454 males and 1,388 females. Gardahiya covers 219.33 ha area. Pincode of Gardahiya is N/A.