We founded Toronto Community Health Profiles Partnership (TCHPP) to fill an important knowledge gap: community organizations and health and social services providers had little access to urgently-needed, community-level, demographic, socioeconomic, and population health information about the areas and populations they served. In 2005, TCHPP expanded to become Ontario Community Health Profiles Partnership, a publicly accessible, searchable health database and service that many health and community organizations across the province today depend on to help plan and evaluate their programs.