There is a tribal system in the district. The main tribe of Sherai district is named as Sherani (Marani). And another tribe of the district is named Harifal. The Sherani tribe living in Sherani district is divided into two main branches, the Hasan Khel and The Oba Khel, and one small branch, the Kapip. Hasan Khel is further divided into Karmanzai, Muhammad Zai, Haizai, Ranaizai, etc. Muhammad Zai is the biggest clan with respect to population.
The peoples of Sherani tribe have long historical background. They fought against the British army for a long time. Masho Khan Sherani was the leader of these Sherani warriors. He was killed during fighting against British army in the famous area of Zhob District called "Silyazi". tribe Harifal is divided in three main branches one of them is Hasan Khel seconed is Naqeeb khail thred is Ibrahim Khail