Longkoi Bey Gaon is a village in Diphu tehsil in district of Karbi Anglong, Assam, India. As per the data provided by Census of India in 2011, total population of Longkoi Bey Gaon was 323 which includes 153 males and 170 females. Longkoi Bey Gaon covers 35 ha area. Pincode of Longkoi Bey Gaon is 782461.