Population density (people per sq. km of land area)

Definition

Population density is midyear population divided by land area in square kilometers. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship--except for refugees not permanently settled in the country of asylum, who are generally considered part of the population of their country of origin. Land area is a country's total area, excluding area under inland water bodies, national claims to continental shelf, and exclusive economic zones. In most cases the definition of inland water bodies includes major rivers and lakes.

Methodology for Environment indicators

Environmental indicators cover emissions, land use, biodiversity, and natural resources. Emissions data is often produced by international scientific consortia (EDGAR, Global Carbon Project) and typically lags 2–3 years due to the complexity of fuel- and process-level accounting. Per-capita metrics reveal a different story than absolute totals — small wealthy countries can have high per-capita emissions while contributing little to the global total.

How to interpret

• Always check the unit and reporting year before comparing values across countries.
• NULL or "Not available" means the World Bank did not publish a value — we never estimate.
• Year-over-year changes can be driven by methodology updates, not just real economic shifts.