Isoko comprises of predominately two local government areas: Isoko North LGA with Headquarters in Ozoro and Isoko South LGA with Headquarters in Oleh. There are also many Isoko speaking clans in Ndowke West LGA and also in Bayelsa and Rivers States of Nigeria.
The two predominate Local Government Areas are located in southern Nigeria around the northwestern side of Niger Delta. These Local Government Areas are part of Delta State, which was carved out of Bendel State in 1991 along with Edo State. Bendel State was formerly part of the Mid-Western Region formed in 1967.
The language spoken in Isokoland is called Isoko, but many communities and clans have different dialects and various of the Isoko language. The Urhobos are a sister community to the Isokos. There are various oral history as to the ancestry relationship between the Isokos and the Urhobos. Some Oral tradition have it that the Isokos and Urhobos were initially together before a separation, others have it that both descended from a common ancestor. However, both tribe have some striking similar traditions, cultures, dressing and their languages sound linguistically similar.