These terms have distinct but related meanings. In the context of the CHI Navigator, community health is “a multi-sector and multi-disciplinary collaborative enterprise that uses public health science, evidence-based strategies, and other approaches to engage and work with communities, in a culturally appropriate manner, to optimize the health and quality of life of all persons who live, work, or are otherwise active in a defined community or communities” (source: Goodman RA, Bunnell R, Posner SF ). Population health is often defined as “the health outcomes of a group of individuals, including the distribution of such outcomes within the group” (sources: Kindig D, Stoddart, G and Kindig, DA ). This definition explicitly emphasizes health outcomes. The reference to the distribution of outcomes within a group implies the need to consider why differences exist, including those in patient populations or in communities, but does not specify how to achieve population health. For the purposes of the CHI Navigator, community health includes approaches that lead to optimal health outcomes for the whole community with a particular emphasis on reaching vulnerable/underserved populations that experience the highest burden of disease. This definition includes addressing who should be involved, and how to achieve health and quality of life in communities (see definition above).