Urban Development in Cambodia 13 indicators covering urban development for Cambodia. IndicatorLatest Year10-yr change Rank Population in the largest city 33.1% 2025 down 12.7% 64th Population density 98.71 people per sq. km of land area 2023 up 14.9% 105th PM2.5 air pollution, mean annual exposure 19.43 micrograms per cubic meter 2023 down 9.9% 89th Population in urban agglomerations of more than 1 million 2.43 million 2025 up 36.4% 80th Population in urban agglomerations of more than 1 million, per capita 0.1359 units per person 2025 up 19.4% 97th Population in urban agglomerations of more than 1 million, annual 3.11 % change on previous year 2025 down 1.5% 31st Population in urban agglomerations of more than 1 million, per unit 0 units per US$ of GDP 2025 down 35.7% 47th Population in urban agglomerations of more than 1 million, per square 12.92 units per square kilometre 2023 up 36.5% 71st Population in largest city 2.43 million 2025 up 36.4% 76th Crude steelmaking capacity 0 Tonnes 2025 — 97th Africa's Development Dynamics (AfDD) Table 23 - Ecological 28.55 Hectares 2020 up 176.7% 108th PM2.5 air pollution, population exposed to levels exceeding WHO 100.0% 2017 unchanged 1st Dollar value of all resources made available to strengthen 1.01 million 2023 down 82.7% 89th