Urban Development in El Salvador 13 indicators covering urban development for El Salvador. IndicatorLatest Year10-yr change Rank Population in the largest city 23.6% 2025 down 7.6% 104th Population density 304.52 people per sq. km of land area 2023 up 2.8% 40th PM2.5 air pollution, mean annual exposure 29.59 micrograms per cubic meter 2023 down 5.3% 51st Population in urban agglomerations of more than 1 million 1.13 million 2025 up 3.0% 117th Population in urban agglomerations of more than 1 million, per capita 0.1779 units per person 2025 up 0.1% 77th Population in urban agglomerations of more than 1 million, annual 0.8047 % change on previous year 2025 up 247.4% 90th Population in urban agglomerations of more than 1 million, per unit 0 units per US$ of GDP 2025 down 34.2% 62nd Population in urban agglomerations of more than 1 million, per square 53.86 units per square kilometre 2023 up 2.0% 20th Population in largest city 1.13 million 2025 up 3.0% 121st Crude steelmaking capacity 0.249 Tonnes 2025 unchanged 82nd Africa's Development Dynamics (AfDD) Table 23 - Ecological 24.44 Hectares 2020 up 15.6% 115th PM2.5 air pollution, population exposed to levels exceeding WHO 100.0% 2017 unchanged 1st Dollar value of all resources made available to strengthen 7.04 million 2023 up 1,645.8% 42nd