Karnai Chak is a village in Rudauli tehsil in district of Faizabad, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Karnai Chak was 99 which includes 55 males and 44 females. Karnai Chak covers 23.66 ha area. Pincode of Karnai Chak is 225108.