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Ontario Marginalization Index (ON-Marg)
map of souther n Ontario neighbourhoods

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Public Health Ontario


Ontario Community Health Profiles Partnership (OCHPP)


ON-Marg is a data tool that combines a wide range of demographic indicators into four distinct dimensions of marginalization. As a multifaceted index, ON-Marg measures multiple axes of deprivation in Ontario, including economic, ethno-racial, age-based, and social marginalization. It can be used for:

  • research
  • population health assessments
  • resource allocations and program planning
  • assessing health inequities

ON-Marg data is now available for 2001, 2006 and 2011, making it possible to track changes in marginalization and health equity over time. The 2011update to  ON-Marg combines data from several sources including: including Statistics Canada Taxfiler data, Municipal Property Assessment Corporation data, the Registered Persons Database, and the Immigration Refugees, Citizenship Canada (IRCC) Permanent Resident Database.

Data is available at the small area level as well as larger geographies such as public health units and Local Health Integration Networks (LHINs).

The 2011 update to ON-Marg was created in partnership with researchers from the Centre for Urban Health Solutions at St. Michael's Hospital




Supporting Documents

User Guide

Outlines everything you need to know about using ON-Marg for completing your own analyses.

View the user guide »


Technical Document

Background information on ON-Marg methodology, data sources and how the different dimensions were calculated.

View the technical document »


Frequently Asked Questions

References the most common questions asked to help you use ON-Marg.

View the FAQs »


Social Determinants of Health Map

​​​The updated 2011 ON-Marg data is now included in our Social Determinants of Health (SDOH) Map, an interactive tool that shows the distribution of SDOH indicators across the province, LHINs and public health units.

View SDOH Map »


Additional Resources

About our Partners

The 2011 update to ON-Marg was jointly published with the Centre for Urban Health Solutions, an inter-disciplinary research centre within St. Michael’s Hospital in Toronto. The Centre seeks to improve health in cities, especially for those experiencing marginalization, and to reduce barriers to accessing factors essential to health, such as appropriate health care and quality housing.

SMH_CentreForUrbanHealthSolutions_web.pngON-Marg logo.png
Page last reviewed:
Page last updated: 2017-12-20 9:11 AM
Uncontrolled print copy. Valid only on day of Print: [date]
Page updated on [date/time] 2017-12-20 9:11 AM
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