people
Population by Country
Explore population by country on an interactive map, with rankings, source notes and country comparison links.
What the population distribution reveals
Metric guides
Country metrics you can explore on the map.
The interactive map is the fastest way to compare countries, but a useful comparison starts with the question a metric can actually answer. These guides describe the observed distribution, explain the calculation or source definition, identify interpretation limits and connect each ranking to a worked example and the live map.
current USD
GDP by Country
Compare nominal GDP by country and country group using sourced economic data and interactive map views.
What nominal GDP reveals—and what it leaves out
km2
Land Area by Country
Compare land area by country and use map outlines to understand country size beyond projection distortions.
What measured area corrects on a flat map
current USD per person
GDP per Capita by Country
Explore GDP per capita by country with a colour-gradient map and notes on why per-person metrics should not be summed.
Why the denominator reshapes the ranking
people per km2
Population Density by Country
Compare population density by country and see why density is best displayed as a colour-gradient metric.
Why small places rise to the top
barrels per day
Oil Production by Country
Compare crude oil production by country with rankings, source context and live map links.
What the production leaders show
million tonnes CO2
CO2 Emissions by Country
Compare territorial CO2 emissions by country and understand the difference between total and per-person emissions.
What total territorial emissions emphasize
billion m3 per year
Renewable Freshwater by Country
Compare renewable internal freshwater resources by country and learn why freshwater is mostly a renewable flow metric.
Why total flow and per-person supply diverge
current USD
Military Expenditure by Country
Compare military expenditure by country and group, with notes on additive totals and interpretation limits.
What absolute spending concentrates
TWh
Electricity Generation by Country
Compare electricity generation by country and explore related hydro, nuclear, solar and wind generation metrics.
What power-system scale reveals
Interactive map
Explore more metrics on the map
Open the complete metric catalog to compare countries and groups across geography, population, economy, resources, energy, agriculture, environment, health and development.