A focus on aggregates, groups, or communities as clients is an important characteristic of community health nursing practice. Community health nurse practitioners have identified population groups as one of five functional components in a typology of community health nursing practice. Questions have been raised, however, as to whether such groups need different forms of nursing diagnoses than those used for individuals. We attempted to use nursing diagnoses in a senior community health nursing course with undergraduate students that included experience working with aggregates or groups. Issues were identified in relation to the scope of the role of nurses in the community, the selection of the client, and the use of a taxonomy.