Urban Development in South Africa 13 indicators covering urban development for South Africa. IndicatorLatest Year10-yr change Rank Population in the largest city 15.6% 2025 up 12.2% 132nd Population density 52.11 people per sq. km of land area 2023 up 15.6% 151st PM2.5 air pollution, mean annual exposure 27.72 micrograms per cubic meter 2023 down 2.4% 55th Population in urban agglomerations of more than 1 million 23.36 million 2025 up 23.7% 17th Population in urban agglomerations of more than 1 million, per capita 0.3607 units per person 2025 up 8.4% 26th Population in urban agglomerations of more than 1 million, annual 1.74 % change on previous year 2025 down 32.8% 52nd Population in urban agglomerations of more than 1 million, per unit 0.0001 units per US$ of GDP 2025 up 0.4% 42nd Population in urban agglomerations of more than 1 million, per square 18.59 units per square kilometre 2023 up 25.7% 56th Population in largest city 6.44 million 2025 up 29.3% 35th Crude steelmaking capacity 8.05 Tonnes 2025 down 14.1% 24th Africa's Development Dynamics (AfDD) Table 23 - Ecological 750.74 Hectares 2020 up 62.4% 17th PM2.5 air pollution, population exposed to levels exceeding WHO 100.0% 2017 unchanged 1st Dollar value of all resources made available to strengthen 5.76 million 2023 up 2,647.7% 49th