Population geography is a branch of human geography that is focused on the scientific study of people, their spatial distributions and density. To study these factors, population geographers examine the increase and decrease in population, peoples' movements over time, general settlement patterns and other subjects such as occupation and how people form the geographic character of a place. Population geography is closely related to demography. Population Geography also looks at the ideas of how many people live where and what impact it has on the world system.Population geography can essentially be split into two categories: demography and spatial demography. Demography is the measurement of human characteristics, including not only basic statistics on race, age, and gender, but also measurements of education, housing, income, and employment. Demography also encompasses characteristics of a specific area, like population density, crime rate, and unemployment rate. This comprehensive textbook is an ideal classroom study book for instructors who are introducing their students to the topic of population geography.