Karmahva is a village in Nautanwa tehsil in district of Mahrajganj, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Karmahva was 1,277 which includes 615 males and 662 females. Karmahva covers 161.42 ha area. Pincode of Karmahva is N/A.