The Ovimbundu (singular Ocimbundu, adjective and language Umbundu), also known as the Southern Mbundu, are an ethnic group who live on the Bié Plateau of central Angola and in the coastal strip west of these highlands.

As the largest ethnic group in Angola, they make up almost 40 percent of the country's population.

Overwhelmingly the Ovimbundu follow Christianity, mainly the Igreja Evangélica Congregacional de Angola (IECA), founded by American missionaries.

However, some still retain beliefs and practices from African traditional religions.