Longechuk is a county in the Upper Nile, South Sudan.Longechuk County is the second largest county in term of landmass next to Akoka County in Upper Nile State . It has a population of One hundred and fourteen Thousand, Six hundred and three (114,603) according to the household count in 2011. It is inhabited by Nuer Section of Gaat - Jaak (Jikany) and Koma tribe.