Isoko people are an ethnolinguistic group who inhabit the Isoko region of Delta State, and Bayelsa State Nigeria.They are people of southern Nigeria, near the northwestern Niger delta. Delta State and Bayelsa State are part of the 36 states of the Federal Republic of Nigeria. The Isokos speak the Isoko language, a language of the Kwa branch of the Niger-Congo family which is also very linguistically similar to the Urhobo language, Epie-Atissa language, Engenni language. James W. Welch asserted that Isoko language is a dialect of Urhobo language, and many people share that opinion.