Johannesburg is South Africa's largest and most populated city with 3.9 million residents, easily boasting the largest economy of the country and thus Sub-Saharan Africa. Located in Gauteng province, and pronounced jō-hān'ĭs-bûrg', it's commonly referred to by one of it's shortened nicknames; Jo'burg, Jozi, Egoli or the city of gold.
From the Travel Guide