Discussion on defining district borders for Johannesburg is in progress. If you know the city pretty well, please share your opinion on the talk page.
Johannesburg has a population of 9.6 million people (South African 2011 census), half of which live in Soweto and adjacent suburbs. The majority of the population is formed by South Africa's black residents who mostly live in Soweto, while white residents amount to 1,333,790 (although the number is likely to be higher). There are also around 300,000 residents of other descent. Unlike other South African cities, no language group dominates, although English is the established lingua franca. The city is the economic hub of South Africa, and increasingly for the rest of Africa. Although estimates vary, about 10% of sub-Saharan Africa's GDP is generated in Johannesburg. Yet the city's wealth is unequally distributed among its inhabitants causing the city to have, within its own borders, living conditions varying from first world standards to third world conditions. The contrast between rich and poor has led to one of the highest crime rates in the world. The more affluent tend to live in houses with a high level of security by western standards, whilst the less affluent live in less desirable housing conditions. Don't avoid Johannesburg because of its crime however, since it is perfectly possible to have a safe and enjoyable stay if precautions are taken. Many South Africans choose to live here over other, safer parts of the country.