The Katse Dam is a large arch dam located in Lesotho, a landlocked country in southern Africa. It is the largest dam in Lesotho and one of the largest in Africa. The dam was built in the late 1980s and early 1990s as part of the Lesotho Highlands Water Project, which aims to provide water to the nearby countries of South Africa and Lesotho.

The Katse Dam is situated in the highlands of Lesotho, at an altitude of over 1,800 meters above sea level. The dam is 185 meters high and 470 meters long, and has a capacity of approximately 1.9 billion cubic meters of water. The dam is named after the nearby village of Katse, and was built on the Bokong River, one of the main tributaries of the Orange River.

The dam was constructed to help address the increasing water demands of South Africa and to provide hydroelectric power to Lesotho. The dam provides a reliable source of water for agricultural and industrial use, as well as hydropower generation, which is sold to South Africa. The dam has also created a large lake, the Katse Reservoir, which provides recreational opportunities for tourists and local communities.