Kamnagar is a village in Beldanga II tehsil in district of Murshidabad, West Bengal, India. As per the data provided by Census of India in 2011, total population of Kamnagar was 7,923 which includes 4,149 males and 3,774 females. Kamnagar covers 791.64 ha area. Pincode of Kamnagar is 742405.