Japan vs Sierra Leone: Population density
Japan
210.83 people per km²
in 2100
Sierra Leone
220.76 people per km²
in 2100
Japan rank
73rd
Sierra Leone rank
71st
Population density over time
- Japan
- Sierra Leone
How they compare
Sierra Leone currently reports 220.76 people per km² against 210.83 people per km² in Japan, a difference of 9.93 people per km².
The two have swapped places 1 time across 318 shared years of data; in 1000 it was Japan ahead.
Japan ranks 73rd and Sierra Leone ranks 71st of 235 countries.
Across the 48 decades both report, Japan averaged higher in 46 and Sierra Leone in 2.
Head to head by decade
| Decade | Japan | Sierra Leone | Difference | Ahead |
|---|---|---|---|---|
| 1000s | 16.46 people per km² | 0.0544 people per km² | 16.41 people per km² | Japan |
| 1100s | 17.01 people per km² | 0.0604 people per km² | 16.95 people per km² | Japan |
| 1200s | 17.56 people per km² | 0.0671 people per km² | 17.49 people per km² | Japan |
| 1300s | 20.03 people per km² | 0.0746 people per km² | 19.95 people per km² | Japan |
| 1400s | 25.51 people per km² | 0.0828 people per km² | 25.43 people per km² | Japan |
| 1500s | 33.74 people per km² | 0.092 people per km² | 33.65 people per km² | Japan |
| 1600s | 46.64 people per km² | 0.1023 people per km² | 46.54 people per km² | Japan |
| 1700s | 73.25 people per km² | 0.1136 people per km² | 73.14 people per km² | Japan |
| 1710s | 79.56 people per km² | 0.1263 people per km² | 79.43 people per km² | Japan |
| 1720s | 79.56 people per km² | 0.1403 people per km² | 79.42 people per km² | Japan |
| 1730s | 79.56 people per km² | 0.1559 people per km² | 79.41 people per km² | Japan |
| 1740s | 79.56 people per km² | 0.1732 people per km² | 79.39 people per km² | Japan |
| 1750s | 79.56 people per km² | 0.1924 people per km² | 79.37 people per km² | Japan |
| 1760s | 79.01 people per km² | 0.2138 people per km² | 78.8 people per km² | Japan |
| 1770s | 78.46 people per km² | 0.2376 people per km² | 78.23 people per km² | Japan |
| 1780s | 77.92 people per km² | 0.264 people per km² | 77.65 people per km² | Japan |
| 1790s | 77.37 people per km² | 0.2933 people per km² | 77.07 people per km² | Japan |
| 1800s | 78.61 people per km² | 11 people per km² | 67.6 people per km² | Japan |
| 1810s | 82.7 people per km² | 11 people per km² | 71.7 people per km² | Japan |
| 1820s | 85.43 people per km² | 10.97 people per km² | 74.46 people per km² | Japan |
| 1830s | 86.36 people per km² | 10.9 people per km² | 75.46 people per km² | Japan |
| 1840s | 87.29 people per km² | 10.83 people per km² | 76.46 people per km² | Japan |
| 1850s | 89.32 people per km² | 11.06 people per km² | 78.26 people per km² | Japan |
| 1860s | 92.76 people per km² | 11.73 people per km² | 81.03 people per km² | Japan |
| 1870s | 97.67 people per km² | 12.57 people per km² | 85.11 people per km² | Japan |
| 1880s | 105.4 people per km² | 13.54 people per km² | 91.86 people per km² | Japan |
| 1890s | 115.45 people per km² | 14.58 people per km² | 100.87 people per km² | Japan |
| 1900s | 128.38 people per km² | 15.7 people per km² | 112.68 people per km² | Japan |
| 1910s | 144.56 people per km² | 16.84 people per km² | 127.72 people per km² | Japan |
| 1920s | 164.54 people per km² | 18.65 people per km² | 145.88 people per km² | Japan |
| 1930s | 188.17 people per km² | 21.54 people per km² | 166.63 people per km² | Japan |
| 1940s | 214.92 people per km² | 25.21 people per km² | 189.71 people per km² | Japan |
| 1950s | 251.17 people per km² | 29.26 people per km² | 221.91 people per km² | Japan |
| 1960s | 276 people per km² | 34 people per km² | 242 people per km² | Japan |
| 1970s | 308.37 people per km² | 40.9 people per km² | 267.48 people per km² | Japan |
| 1980s | 331.07 people per km² | 50.19 people per km² | 280.88 people per km² | Japan |
| 1990s | 343.78 people per km² | 58.45 people per km² | 285.33 people per km² | Japan |
| 2000s | 350.51 people per km² | 74.05 people per km² | 276.46 people per km² | Japan |
| 2010s | 349.67 people per km² | 96.51 people per km² | 253.16 people per km² | Japan |
| 2020s | 338.46 people per km² | 120.88 people per km² | 217.59 people per km² | Japan |
| 2030s | 318.92 people per km² | 145.08 people per km² | 173.84 people per km² | Japan |
| 2040s | 298.86 people per km² | 167.89 people per km² | 130.97 people per km² | Japan |
| 2050s | 279.93 people per km² | 187.75 people per km² | 92.18 people per km² | Japan |
| 2060s | 259.83 people per km² | 203.33 people per km² | 56.51 people per km² | Japan |
| 2070s | 240.76 people per km² | 214.27 people per km² | 26.49 people per km² | Japan |
| 2080s | 227.2 people per km² | 220.13 people per km² | 7.06 people per km² | Japan |
| 2090s | 216.56 people per km² | 221.56 people per km² | 5 people per km² | Sierra Leone |
| 2100s | 210.83 people per km² | 220.76 people per km² | 9.93 people per km² | Sierra Leone |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher population density, Japan or Sierra Leone?
- Sierra Leone, at 220.76 people per km² against 210.83 people per km² in Japan as of 2100.
- What is the difference in population density between Japan and Sierra Leone?
- 9.93 people per km², with Sierra Leone ahead.
- How many years of comparable data are there for Japan and Sierra Leone?
- 318 years are reported by both, from 1000 to 2100.
- How do Japan and Sierra Leone rank globally for population density?
- Japan ranks 73rd and Sierra Leone ranks 71st of 235 countries.
- Where does this data come from?
- HYDE (2023); Gapminder (2022); UN WPP (2024); UN FAO (2024) – with major processing by Our World in Data, published as Population density. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Population per square kilometer by country, available from 10,000 BCE to 2100, based on data and estimates from different sources.