Warri is a city in Delta State Nigeria. It is a major center of oil and gas related activities in the country.
Between 1997-2003, the city witnessed a bloody wave of violence and unrest.
The Warri River is a major river in the area, it lies North West of the main Niger Delta and South of the city. The city is located within the Niger delta region of Nigeria made up of Akata, Agbada and Benin formations and flat plains greater than 6 m above sea level.
Warri has a high proportion of residents who are considered migrants many of whom are from the immediate vicinity. Some migrants from North Nigeria historically inhabited the Hausa quarters while others live in government or corporate staff quarters. Historically, since the 1950s, the city has developed as a center of industry with a relatively high number of mid level mangers, executives and some contractors affiliated with the Delta Steel Company. Major residential areas are along Jakpa road, Okumagba layout, Airport Road, Upper/Lower Erejuwa, Enerhen and Udu Road.
During the 1950s and 1960s the population of the city went through high levels of growth. During the period, expansion consumed the nearby center of Effurun to create a Warri-Effurun conurbation. Growth was driven initially by the administrative location of Warri in the Delta province and also due to increased industrial activities in the city. After the outbreak of civil war in 1967 which crippled much of the oil activities in East of Nigeria, Warri located in the Midwest region and the major city nearest to the oil producing areas of the old Bendel State gradually became an oil city. A deepening of the Escravos river led to improved port facilities in the area and also a refinery was built in the vicinity.
 Public services
The city like many urban agglomerations in Nigeria suffers from problems of efficient refuse disposal, off loading in electricity supply to inefficient electricity supply and a frustrating water supply situation.
Warri has had its share of conflicts from inter-ethnic hostilities arising largely from claims of indigeneity, ethnic nationalism and issues on local government relocation to militants fighting for social justice with the use of explosives to bomb oil facilities and kidnapping.
A conflict before the March 2003, elections resulted in thousands of people fleeing there home.