the number of persons per square kilometer in a country is called
Population density For humans, population density is the number of people per unit of area, usually quoted per square kilometer or square mile (which may include or exclude, for example, areas of water or glaciers). Commonly this may be calculated for a county, city, country, another territory or the entire world.
Demographics of India India is the second most populated country in the world with nearly a fifth of the world's population. According to the 2017 revision of the World Population Prospects[1], the population stood at 1,324,171,354.