Karmahna 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 Karmahna was 1,633 which includes 859 males and 774 females. Karmahna covers 522.37 ha area. Pincode of Karmahna is 271604.