With 4,803,262 inhabitants, Johannesburg is the most populated city in South Africa and a megacity, ranking in the top 100 largest urban areas globally. It serves as the provincial capital of South Africa’s richest province, Gauteng.The Constitutional Court, the highest court in South Africa, has its headquarters in Johannesburg. Johannesburg is home to the majority of significant banks and businesses in South Africa. Situated amidst the resource-rich Witwatersrand hills, the city serves as the hub of the global mineral, gold, and diamond trade.