_Population Geography_ guides readers through the dynamic and complex relationships between human populations and the environments they inhabit. The interactive ebook examines demographic principles while also exploring how human populations influence and are influenced by societal, economic, and environmental factors. It offers a transdisciplinary approach that emphasizes the interconnectedness of human geography, population geography, and ecological economics, encouraging a holistic view of human-environment interactions. The interactive ebook format allows students to read the text of each chapter and engage with digital learning activities—including videos, assignments, quizzes, and skill-building activities—all within a single system. The text discusses the historical transition of populations, the influence of migrations, the role of technology, and the necessity of sustainable practices within the context of global challenges like climate change and resource scarcity. The book also evaluates the interplays between population policies and political economies, as well as perspectives on earth observation data's support for achieving sustainable development goals. _Population Geography_ is especially relevant for those studying human geography, population studies, ecological economics, and sustainability science.