Population science addresses health from a community-based perspective, informing our understanding of the social determinants of health in diverse populations, with the goal of increasing health equity for all. Population Science Methods and Approaches to Aging and Alzheimer's Disease and Related Dementias Research aims to introduce readers to population health and health equity in the context of aging-related research. With an emphasis on minoritized, limited English proficient, and low-income communities, this book covers the conditions that lead to disparities in cognitive health as we age-and how those disparities might be addressed at a community level. Each of this book's edited chapters includes learning objectives and discussion questions to facilitate active learning. Readers will gain a foundational knowledge of the population science framework, as well as a newfound compassion and an understanding of meaningful next steps toward equity. Researchers and practitioners alike will discover new directions for reducing health disparities among older people and engaging in prevention for aging-related conditions.