This article discusses how South Africa's population has shifted from being predominantly rural to predominantly urban since 1911. Using nearly 100 years of census data, urbanization trends are discussed and the relative percentage levels of the urban population living in the various settlement categories is examined. The nine largest centres are home to a disproportionately large share of the national urban population, relative to international norms, and have held this position for nearly 100 years. Despite this, it is noteworthy that population growth is taking place in absolute terms in all settlement categories and in rural areas. These growth patterns need to be seen within the context of national spatial development and urban development priorities.