- Warri is a city in Delta State, located in southern Nigeria. It is a major oil and gas hub in Nigeria and is known for its industrial activities and vibrant culture. Warri is home to numerous oil refineries and multinational oil companies. The city is also known for its rich history, with landmarks such as the Warri Kingdom Royal Cemetery and the Effurun Market. Warri is inhabited by various ethnic groups, including the Itsekiri, Urhobo, and Ijaw. The city has a diverse population and is known for its lively music and entertainment scene.