This document provides an overview of community health nursing. It defines key terms like community, health, and nursing. It describes the causes of poor health and the three types of communities. It explains that community health nursing combines nursing, public health, and social work to promote health, prevent disease, and rehabilitate illness within a defined community. The aims, objectives, principles, functions, and roles of community health nursing are outlined. These include health promotion, disease prevention, treatment, rehabilitation, evaluation, and research at the individual, family, and population levels.