Lowest Population Density: The top ten least densely populated countries, in square kilometers, in 2011. 1. Western Sahara1.85 2. Mongolia1.99 3. Namibia2.59 4. Australia2.80 5. Iceland3.08 6. Mauritania3.11 7. Suriname3.12 8. Botswana3.58 9. Libya3.67 10. Canada3.71 NOTE: Country rankings of the type presented above cannot pretend to be definitive; instead they aspire only to provide the reader with an approximation of the high and low ends on a particular scale. Country data vary enormously depending on the sources, and the absence of reliable data on some countries requires their omission, which further skews the results. Only countries for which statistics were available figure in these lists. †Population density calculated using population and land area.Source:The World Factbook, 2011.