The Zambezi (also spelled Zambesi) is the fourth-longest river in Africa, and the largest flowing into the Indian Ocean from Africa. The area of its basin is 1,390,000 km² (537,000 miles²), slightly less than half that of the Nile. The 2,574 km- (1,600 mile-) long river has its source in Zambia and flows through Angola, along the borders of Namibia, Botswana, Zambia, and Zimbabwe, to Mozambique, where it empties into the Indian Ocean.

The Zambezi's most spectacular feature is Victoria Falls, the world's largest waterfalls. Other notable falls include the Chavuma Falls at the border between Zambia and Angola, and Ngonye Falls, near Sioma in Western Zambia.

There are two main sources of hydroelectric power on the river. These are the Kariba Dam, which provides power to Zambia and Zimbabwe and the Cahora Bassa Dam in Mozambique which provides power to South Africa. There is also a smaller power station at Victoria Falls.