Urban Development in Mexico 15 indicators covering urban development for Mexico. IndicatorLatest Year10-yr change Rank Population in the largest city 21.5% 2025 down 5.7% 109th Population density 66.74 people per sq. km of land area 2023 up 9.6% 137th PM2.5 air pollution, mean annual exposure 16.61 micrograms per cubic meter 2023 down 5.5% 105th Population in urban agglomerations of more than 1 million 56.29 million 2025 up 13.6% 6th Population in urban agglomerations of more than 1 million, per capita 0.4266 units per person 2025 up 4.3% 21st Population in urban agglomerations of more than 1 million, annual 1.35 % change on previous year 2025 down 12.7% 68th Population in urban agglomerations of more than 1 million, per unit 0 units per US$ of GDP 2025 down 24.8% 63rd Population in urban agglomerations of more than 1 million, per square 28.19 units per square kilometre 2023 up 14.1% 38th Population in largest city 22.75 million 2025 up 6.6% 7th Crude steelmaking capacity 27.66 Tonnes 2025 up 3.6% 10th Africa's Development Dynamics (AfDD) Table 23 - Ecological 1,264 Hectares 2020 up 39.2% 12th PM2.5 air pollution, population exposed to levels exceeding WHO 99.7% 2017 down 0.3% 142nd Dollar value of all resources made available to strengthen 385,888 2023 up 59.5% 111th Adjusted rural to urban parity index for achieving a minimum 0.4086 2018 down 24.3% 36th Transport equipment indicators — Available seat capacity for schedule 203.4 Per 1 000 inhabitants 2016 up 36.6% 39th