Usar Bk is a village in Mangaon tehsil in district of Raigarh, Chhattisgarh, India. As per the data provided by Census of India in 2011, total population of Usar Bk was 278 which includes 124 males and 154 females. Usar Bk covers 331 ha area. Pincode of Usar Bk is 402122.