Tola Karwamarni is a village in Katoria tehsil in district of Banka, Bihar, India. As per the data provided by Census of India in 2011, total population of Tola Karwamarni was 369 which includes 192 males and 177 females. Tola Karwamarni covers 96.4 ha area. Pincode of Tola Karwamarni is 813106.