Which countries have owned Walvis Bay?

Answer 1

Britain, South Africa and (current) Namibia. During World War 1, German troops overran the exclave in 1914, and controlled it until 1915 when the British and S. Africans forced them out again. However, due to the shortness of the German rule, only the above 3 nations have controlled it.

Answer 2

Walvis Bay was initially colonized by Germany in the late 19th century. After World War I, it came under South African administration until independence in 1990, when it became part of Namibia.