Tola Karwamarni is a village in Chanan tehsil in district of Banka, Bihar, India. As per the data provided by Census of India in 2011, total population of Tola Karwamarni was 578 which includes 305 males and 273 females. Tola Karwamarni covers 36 ha area. Pincode of Tola Karwamarni is N/A.