Mayom County is an administrative division of Unity State in the Greater Upper Nile region of South Sudan. It is located to the west of Bentiu. The county headquarters is Mayom town. Mayom County is in the northwest of Unity State. The largest town is Mayom. Other towns are Tam, Mankien and Wang-kay. Large villages include Rier, Thargana, Buoth, Wicok …Mayom County is an administrative division of Unity State in the Greater Upper Nile region of South Sudan. It is located to the west of Bentiu. The county headquarters is Mayom town. Mayom County is in the northwest of Unity State. The largest town is Mayom. Other towns are Tam, Mankien and Wang-kay. Large villages include Rier, Thargana, Buoth, Wicok and Toic. Mayom lies in the Block 4 oil concession to the south of the Kaikang oilfield.