Kalna Dih is a village in Kusheshwar Asthan tehsil in district of Darbhanga, Bihar, India. As per the data provided by Census of India in 2011, total population of Kalna Dih was 592 which includes 324 males and 268 females. Kalna Dih covers 20 ha area. Pincode of Kalna Dih is 848209.