Urban Development in Singapore 12 indicators covering urban development for Singapore. IndicatorLatest Year10-yr change Rank Population in the largest city 100.0% 2025 unchanged 1st Population density 8,242 people per sq. km of land area 2023 up 7.9% 3rd PM2.5 air pollution, mean annual exposure 15.14 micrograms per cubic meter 2023 down 40.6% 116th Population in urban agglomerations of more than 1 million 6.16 million 2025 up 11.2% 47th Population in urban agglomerations of more than 1 million, per capita 1.01 units per person 2025 up 0.7% 2nd Population in urban agglomerations of more than 1 million, annual 0.6221 % change on previous year 2025 down 61.0% 95th Population in urban agglomerations of more than 1 million, per unit 0 units per US$ of GDP 2025 down 43.3% 96th Population in urban agglomerations of more than 1 million, per square 8,469 units per square kilometre 2023 up 11.7% 1st Population in largest city 6.16 million 2025 up 11.2% 36th Crude steelmaking capacity 0.8 Tonnes 2025 unchanged 66th Africa's Development Dynamics (AfDD) Table 23 - Ecological 23.24 Hectares 2020 up 25.6% 117th PM2.5 air pollution, population exposed to levels exceeding WHO 100.0% 2017 unchanged 1st