Urban Development in Sierra Leone
6 indicators covering urban development for Sierra Leone.
| Indicator | Latest | Year | 10-yr change | Rank |
|---|---|---|---|---|
| Population in the largest city | 34.3% | 2025 | down 5.8% | 62nd |
| Population density | 117.21 people per sq. km of land area | 2023 | up 26.0% | 91st |
| PM2.5 air pollution, mean annual exposure | 22.46 micrograms per cubic meter | 2023 | up 8.7% | 69th |
| Population in urban agglomerations of more than 1 million | 1.39 million | 2025 | up 33.0% | 110th |
| Population in largest city | 1.39 million | 2025 | up 33.0% | 109th |
| PM2.5 air pollution, population exposed to levels exceeding WHO guidel | 100.0% | 2017 | unchanged | 1st |