Situated on the Highveld, Gauteng is the smallest province by land in South Africa. Though Gauteng accounts for only 1.5% of the country's land area, it is home to more than a quarter of its population. Highly urbanised, the province contains the country's largest city, Johannesburg, which is also one of the largest cities in the world. Gauteng is the wealthiest province in South Africa and considered as the financial hub of Africa, mostly concentrated in Johannesburg. It also contains the administrative capital, Pretoria, and other large areas such as Midrand, Vanderbijlpark, Ekurhuleni and the affluent Sandton. As of 2019, Gauteng is the most populous province in South Africa with a population of approximately 15.5 million people according to estimates.