The number of people living in a unit area of land is termed its

Population density is the number of people living in a unit area of land. It is usually expressed as the number of individuals per square kilometer or square mile. It is an important concept in geography and demography because it helps to measure the concentration of people in a particular area and to understand the relationship between people and their environment. The higher the population density in an area, the greater the pressure on the available resources and the environment.