Where People Live: Population Distribution and Density

The world's people are spread very unevenly. Large clusters exist in East Asia, South Asia and Europe, while deserts, high mountains, dense rainforests and polar regions hold very few. These patterns reflect physical factors such as fresh water, fertile soil and moderate climate, but also history, trade and economic opportunity, which is why coasts and river valleys attract settlement.

Geographers use several measures: arithmetic density divides people by total land area, while physiological density divides them by farmland, revealing pressure on food-producing land. Egypt shows why the difference matters, because its arithmetic density looks moderate, yet nearly everyone lives on the narrow strip of the Nile valley and delta. World population grew slowly for most of history, then accelerated after about 1800 as death rates fell, passing 8 billion in 2022.

Understanding distribution helps governments plan services, transport and responses to hazards.