Population density — Geography, 7–10 years
Population density tells us how many people live in a certain amount of space. It helps us compare a crowded city with a widely spread rural area fairly.
People and space
Population density is a way to describe how closely people live together. It compares the number of people with the size of the area they occupy. A small town can have a lower density than a city even if both places have busy streets.
Why count people and area
Just knowing a place’s population can mislead us. Ten thousand people need very different services if they live in one square kilometre or across one hundred square kilometres. Density helps planners think about homes, roads, schools, water and transport.
Calculating a density
A village has 600 residents and covers 3 square kilometres. To find its population density, divide people by area: 600 ÷ 3 = 200. The density is 200 people per square kilometre. If another area has 200 residents in 1 square kilometre, it has the same density.
A big population is not always crowded
It is reasonable to think that a place with more people must be more crowded. But the area matters too: 20,000 people spread over 1,000 square kilometres may have more space than 5,000 people in 10 square kilometres. Density always needs both numbers.
Using density in real places
A dense neighbourhood may need frequent buses, many flats and several schools close together. A sparsely populated area may need longer roads and different transport because homes are far apart. Density does not say whether a place is good or bad; it describes how people are spread out.
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