Unchhaun is a village in Devprayag tehsil in district of Tehri Garhwal, Uttarakhand, India. As per the data provided by Census of India in 2011, total population of Unchhaun was 147 which includes 57 males and 90 females. Unchhaun covers 80.3 ha area. Pincode of Unchhaun is 249110.