Share of the urban population living in slums, informal settlements or inadequate housing. Source: World Bank — World Development Indicators. Retrieved 15 Oct 2026.
| Period | Slum Population |
|---|---|
| 2022 | 49.3% |
| 2020 | 50.6% |
| 2018 | 53.4% |
| 2016 | 56.1% |
| 2014 | 58.9% |
| 2012 | 61.6% |
| 2010 | 64.3% |
| 2008 | 67.1% |
| 2006 | 69.8% |
| 2004 | 72.5% |
| 2002 | 73.9% |
| 2000 | 73.9% |
149 of 207 indicators carry a figure for Sierra Leone, grouped by topic.