Health indicators are used to measure health status of a given population over a defined period of time. For this resource, appropriate indicators were chosen from the Core Indicators for Public Health in Ontario – a framework developed by the Association of Public Health Epidemiologists of Ontario (APHEO). This framework was developed, and it continues to be updated, in order to standardize and improve the accuracy of community health status reporting across Ontario public health units. This resource provides definitions, methods and resources for calculating over 120 health indicators. Local level, reliable data was unavailable for some indicators therefore, not all were addressed in this resource.