Do More with Data: Ontario Marginalization Index


Ever wonder about the social demographics of Halton neighbourhoods? Now you can access the Ontario Marginalization index in the OKN Data Portal and learn more.

Join us for this workshop to learn how to use the Ontario Marginalization Index in your work.

OKN is thrilled to welcome team members from the MAP Centre for Urban Health Solutions at St. Michael’s Hospital and McMaster University, and Ontario Public Health, who were instrumental in developing the Ontario Marginalization Index for a short workshop on the ON-Marg.

The Ontario Marginalization Index is an area-based index created jointly by the MAP Centre for Urban Solutions at St. Michael’s Hospital and Public Health Ontario. It shows differences in marginalization between geographic areas and helps understand inequalities in health and social well-being outcomes between population groups or geographical areas. You can use it for planning and needs assessment, resource allocation, monitoring of inequities, and research.

In 2023, OKN added the ON-Marg to OKN’s Data Portal, which is available at the neighbourhood level. This workshop will be instrumental in supporting professionals, agencies, and organizations in Halton to incorporate the index into their work and planning.


Trevor van Ingen is an Epidemiologist Lead in the Informatics Department at Public Health Ontario whose work focuses on advancing the reporting systems for population health inequities, including the development of updates to the Ontario Marginalization Index.

Gary Moloney is a Geographic Information Systems specialist at MAP Centre for Urban Health Solutions, St. Michael’s Hospital, Toronto. He holds master’s degrees in spatial analysis and environmental practice. His contributions to peer-led research focus on health equity at the neighbourhood scale.

Flora Matheson is a Research Scientist who leads the Justice and Equity Lab located at MAP Centre for Urban Health Solutions, St. Michael’s Hospital.  As a Sociologist, her research is focused on solutions to reduce social and health inequities among people experiencing problem gambling and imprisonment; solutions that are built with and for these communities. She uses a gender lens and social determinants of health approach to enact change.