Mbaise is a region in Imo State in southeastern Nigeria. In the heart of Igboland, the region includes several towns and cities. The population is composed of indigenous clans, connected by intermarriage. With a population density of over 1,000 people per square kilometer, Mbaise is among West Africa's most densely populated areas; its 2006 population was 611,204.

The name "Mbaise" was derived