Population Distribution and Density
People cluster where land is fertile, climate is mild and jobs exist.
About this topic
Population distribution describes where people live, density how many per square kilometre. Density is calculated as total population divided by area; for example, 60 million people in 240,000 square km gives 250 people per square km. About 90% live in the Northern Hemisphere, and most near coasts and river valleys. Densely populated regions: East Asia, South Asia, Europe, eastern US and Nile delta.
Sparsely populated areas include deserts, mountains, polar and rainforest areas. Factors: physical (climate, relief, water, soil, resources) and human (jobs, history, politics, transport). Flat land with fertile soil and fresh water supports farming and large settlements, while steep, cold or dry land does not. Egypt is a telling case: most of its 100 million-plus people live along the narrow Nile valley and delta, leaving the vast Sahara nearly empty.
Density averages can hide variations: a country can have a low overall density but with most people crowded in a few cities. Dependent on technology, people can live in previously hostile places such as Gulf deserts, using air conditioning, imported food and desalinated water. A useful tip for exam answers is to describe the pattern first, using figures, then explain it with both physical and human factors.
Key ideas
- Density = people ÷ area
- Sparsely vs densely populated
- Megacities
Quick check
Use cases: where Population Distribution and Density helps
- Homework: review the key idea behind Population Distribution and Density before you start a problem set.
- Exam revision: use the quick check to test whether you can recall Population Distribution and Density without notes.
- Visual learning: play with the interactive lab to see how Population Distribution and Density changes when you adjust its inputs.
- Teaching a friend: explain Population Distribution and Density in your own words, then compare your version with the key ideas.
Geography helps with city planning, climate, trade and migration.
Frequently asked questions
What is Population Distribution and Density?
People cluster where land is fertile, climate is mild and jobs exist.
What will I learn in Population Distribution and Density?
Density = people ÷ area. Sparsely vs densely populated. Megacities.
Is Population Distribution and Density part of Geography?
Yes. It is one of 40 Geography topics on LearnViz HighSchoolEdu, with 3 key ideas, a live animation and a quick check.
Does the Population Distribution and Density lab work on a phone or tablet?
Yes. The animation resizes to fit your screen and supports touch, so you can drag, tap and slide with your finger.
How should I study Population Distribution and Density?
Read the summary and key ideas first, play with the interactive lab to see the idea in motion, then answer the quick check. If you get a question wrong, go back to the key idea it tests.
Do I need an account, and is my progress saved?
No account is needed. Marking a topic as learned is saved in your own browser, so it stays on that device and is not sent to a server.