Koach Gaon is a village in Rupahi tehsil in district of Nagaon, Assam, India. As per the data provided by Census of India in 2011, total population of Koach Gaon was 1,765 which includes 911 males and 854 females. Koach Gaon covers 150.25 ha area. Pincode of Koach Gaon is 782125.