Gainjahwa is a village in Balrampur tehsil in district of Balrampur, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Gainjahwa was 5,914 which includes 3,204 males and 2,710 females. Gainjahwa covers 994.78 ha area. Pincode of Gainjahwa is 271201.