Reported cases of measles, per square kilometre in Sierra Leone
Sierra Leone: Reported cases of measles, per square kilometre was 0.0089 Cases per square kilometre in 2023. ◆ Volatile
Reported cases of measles, per square kilometre in Sierra Leone, 1974–2023
Source: Statizoid (derived). Measured in Cases per square kilometre.
Analysis
Sierra Leone recorded 0.0089 Cases per square kilometre for reported cases of measles, per square kilometre in 2023.
The figure is down 11.8% on the previous year and up 4,200.0% over ten years.
Over the whole period, reported cases of measles, per square kilometre in Sierra Leone peaked at 0.0599 Cases per square kilometre in 1983 and was at its lowest, 0 Cases per square kilometre, in 2007.
That places Sierra Leone 31st out of 205 countries with data for 2023, putting it in the top quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Reported cases of measles, per square kilometre in Sierra Leone, year by year
| Year | Cases per square kilometre | Change |
|---|---|---|
| 1974 | 0.0184 Cases per square kilometre | — |
| 1976 | 0.0066 Cases per square kilometre | -64.3% |
| 1977 | 0.0074 Cases per square kilometre | +12.7% |
| 1978 | 0.0021 Cases per square kilometre | -71.7% |
| 1979 | 0.0568 Cases per square kilometre | +2616.6% |
| 1980 | 0.0502 Cases per square kilometre | -11.6% |
| 1981 | 0.0472 Cases per square kilometre | -6.0% |
| 1982 | 0.0568 Cases per square kilometre | +20.4% |
| 1983 | 0.0599 Cases per square kilometre | +5.5% |
| 1984 | 0.0556 Cases per square kilometre | -7.2% |
| 1985 | 0.0464 Cases per square kilometre | -16.6% |
| 1986 | 0.0023 Cases per square kilometre | -95.1% |
| 1987 | 0.0139 Cases per square kilometre | +509.8% |
| 1988 | 0.0029 Cases per square kilometre | -79.3% |
| 1989 | 0.0087 Cases per square kilometre | +201.9% |
| 1990 | 0.0115 Cases per square kilometre | +32.8% |
| 1991 | 0.0039 Cases per square kilometre | -65.8% |
| 1992 | 0.0127 Cases per square kilometre | +221.8% |
| 1993 | 0.0317 Cases per square kilometre | +150.3% |
| 1994 | 0.0016 Cases per square kilometre | -95.0% |
| 1995 | 0.0048 Cases per square kilometre | +201.8% |
| 1997 | 0.005 Cases per square kilometre | +4.9% |
| 2000 | 0.0495 Cases per square kilometre | +890.3% |
| 2001 | 0.009 Cases per square kilometre | -81.8% |
| 2002 | 0.0079 Cases per square kilometre | -12.5% |
| 2003 | 0.0081 Cases per square kilometre | +3.2% |
| 2004 | 0.0001 Cases per square kilometre | -98.8% |
| 2005 | 0.0004 Cases per square kilometre | +314.3% |
| 2006 | 0.0005 Cases per square kilometre | +13.8% |
| 2007 | 0 Cases per square kilometre | -100.0% |
| 2008 | 0.0006 Cases per square kilometre | — |
| 2009 | 0.0004 Cases per square kilometre | -29.5% |
| 2010 | 0.0151 Cases per square kilometre | +3412.9% |
| 2011 | 0.0258 Cases per square kilometre | +71.3% |
| 2012 | 0.0094 Cases per square kilometre | -63.6% |
| 2013 | 0.0002 Cases per square kilometre | -97.8% |
| 2014 | 0.0139 Cases per square kilometre | +6606.7% |
| 2015 | 0.0084 Cases per square kilometre | -39.7% |
| 2016 | 0.0127 Cases per square kilometre | +51.6% |
| 2017 | 0.0259 Cases per square kilometre | +103.6% |
| 2018 | 0.0048 Cases per square kilometre | -81.6% |
| 2019 | 0.0006 Cases per square kilometre | -88.4% |
| 2020 | 0.0002 Cases per square kilometre | -57.5% |
| 2021 | 0.0024 Cases per square kilometre | +900.0% |
| 2022 | 0.0101 Cases per square kilometre | +330.0% |
| 2023 | 0.0089 Cases per square kilometre | -11.8% |
Sierra Leone compared with similar countries
- Sierra Leone's 0.0089 Cases per square kilometre is above the median for low income countries, which is 0.0041 Cases per square kilometre, 2.2× the median. (25 countries reporting)
- Sierra Leone's 0.0089 Cases per square kilometre is above the median for Sub-Saharan Africa, which is 0.0029 Cases per square kilometre, 3.1× the median. (48 countries reporting)
Biggest year-on-year movements
Years where Reported cases of measles, per square kilometre in Sierra Leone changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2014 | +6606.7% | 0.0002 Cases per square kilometre | 0.0139 Cases per square kilometre |
| 2010 | +3412.9% | 0.0004 Cases per square kilometre | 0.0151 Cases per square kilometre |
| 1979 | +2616.6% | 0.0021 Cases per square kilometre | 0.0568 Cases per square kilometre |
| 2021 | +900.0% | 0.0002 Cases per square kilometre | 0.0024 Cases per square kilometre |
| 2000 | +890.3% | 0.005 Cases per square kilometre | 0.0495 Cases per square kilometre |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | 0.0183 Cases per square kilometre | 0.0021 Cases per square kilometre | 0.0568 Cases per square kilometre | 5 |
| 1980s | 0.0344 Cases per square kilometre | 0.0023 Cases per square kilometre | 0.0599 Cases per square kilometre | 10 |
| 1990s | 0.0102 Cases per square kilometre | 0.0016 Cases per square kilometre | 0.0317 Cases per square kilometre | 7 |
| 2000s | 0.0077 Cases per square kilometre | 0 Cases per square kilometre | 0.0495 Cases per square kilometre | 10 |
| 2010s | 0.0117 Cases per square kilometre | 0.0002 Cases per square kilometre | 0.0259 Cases per square kilometre | 10 |
| 2020s | 0.0054 Cases per square kilometre | 0.0002 Cases per square kilometre | 0.0101 Cases per square kilometre | 4 |
Countries ranked near Sierra Leone
- 28 Equatorial Guinea 0.0096 Cases per square kilometre compare
- 29 Indonesia 0.0095 Cases per square kilometre compare
- 30 Chad 0.0094 Cases per square kilometre compare
- 32 Zambia 0.0076 Cases per square kilometre compare
- 33 United Arab Emirates 0.0068 Cases per square kilometre compare
- 34 Nepal 0.0067 Cases per square kilometre compare
More health data for Sierra Leone
- Un projection of annual infant deaths, annual growth rate -2.34 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 0.773 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 1,199 deaths per 1,000 people (2090)
- Number of infants who die before age 1 4,209 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 38 (2025)
- Population ages 00-04, female, annual growth rate 0.6447 % change on previous year (2025)
- Population ages 00-04, female, per unit of GDP 0.0001 units per US$ of GDP (2025)
- Population ages 00-04, female, per capita 0.0663 units per person (2025)
- Population ages 00-04, male, annual growth rate 0.6611 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0.0001 units per US$ of GDP (2025)
Frequently asked questions
- What is reported cases of measles, per square kilometre in Sierra Leone?
- Reported cases of measles, per square kilometre in Sierra Leone was 0.0089 Cases per square kilometre in 2023, according to Statizoid (derived).
- What is the highest reported cases of measles, per square kilometre recorded in Sierra Leone?
- The highest recorded value was 0.0599 Cases per square kilometre in 1983.
- What is the lowest reported cases of measles, per square kilometre recorded in Sierra Leone?
- The lowest recorded value was 0 Cases per square kilometre in 2007.
- How does Sierra Leone rank for reported cases of measles, per square kilometre?
- Sierra Leone ranks 31st out of 205 countries with data for 2023.
- Is reported cases of measles, per square kilometre rising or falling in Sierra Leone?
- Over the last ten years it is up 4,200.0%. The long-run trend across the full record is volatile.
- Where does this Sierra Leone data come from?
- The figures come from Statizoid (derived), published as part of Reported cases of measles, per square kilometre. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 46 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
Reported cases of measles divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.
Reported cases of measles ÷ Land area (sq. km)
Computed from
- Reported cases of measles World Health Organization – Global Health Observatory (2026) – with minor processing by Our World in Data
- Land area FAOSTAT, Food and Agriculture Organization of the United Nations (FAO)
Statizoid computes this series; the underlying measurements belong to the publishers named above. The arithmetic is applied to every country and year where both inputs report, and nothing is estimated unless the page says so.
About this data
Reported cases of measles divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.