Kosir is a village in Sarangarh tehsil in district of Raigarh, Chhattisgarh, India. As per the data provided by Census of India in 2011, total population of Kosir was 4,755 which includes 2,325 males and 2,430 females. Kosir covers 867.01 ha area. Pincode of Kosir is 496445.