Riwa Gahan is a village in Khairagarh tehsil in district of Rajnandgaon, Chhattisgarh, India. As per the data provided by Census of India in 2011, total population of Riwa Gahan was 769 which includes 367 males and 402 females. Riwa Gahan covers 346.79 ha area. Pincode of Riwa Gahan is 491881.