Wynberg is a suburb of Johannesburg, South Africa. Johannesburg ( Pronounced /jō-hān'ĭs-bûrg'/ is the largest city in South Africa. The Republic of South Africa (also known by other official names) is a country located at the southern tip of the continent of Africa It is located in Region 3. Region 3 was an administrative district in the city of Johannesburg, South Africa, and was also known as the Sandton region