Canada Website Population density is made up of two variables. These are the number of people, and the size of the area. Population density provides a useful means for comparing population distribution .
Densities vary considerably over the globe.
The location of people within an area. Areas may be compared by looking at variations in population density. Population is unevenly distributed for a number of reasons. At the other extreme, urban areas such as Mong Kok in Hong Kong may have as many as 160,000 people living in one square kilometre. The above map is a generalization only.