Kosir is a village in Pamgarh tehsil in district of Janjgir Champa, Chhattisgarh, India. As per the data provided by Census of India in 2011, total population of Kosir was 2,515 which includes 1,266 males and 1,249 females. Kosir covers 964.41 ha area. Pincode of Kosir is 495554.