Kasma Balbhadar is a village in Keotiranway tehsil in district of Darbhanga, Bihar, India. As per the data provided by Census of India in 2011, total population of Kasma Balbhadar was 309 which includes 175 males and 134 females. Kasma Balbhadar covers 29 ha area. Pincode of Kasma Balbhadar is 847121.