OLRB Geographic Areas Map
Courtready’s OLRB geographic areas map shows you which of the 33 geographic areas set by the Ontario Labour Relations Board in construction industry certification cases covers any Ontario address.
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The Ontario Labour Relations Board divides the province into 33 geographic areas for construction industry certification cases. Filter the list below by county, township, or city to find the relevant area.
The County of Essex and the Municipality of Chatham-Kent.
The County of Lambton.
The Counties of Oxford, Perth, Huron, Middlesex, Bruce, and Elgin.
The County of Brant and Norfolk County.
The Regional Municipality of Niagara and Haldimand County.
The Regional Municipality of Waterloo (except that portion of the geographic Township of Beverly annexed by North Dumfries Township).
The County of Wellington.
The City of Toronto, the Regional Municipalities of Peel and York, the Towns of Oakville and Halton Hills and that portion of the Town of Milton within the geographic Townships of Esquesing and Trafalgar, and the Town of Ajax and the City of Pickering in the Regional Municipality of Durham.2
The Regional Municipality of Durham (except for the Town of Ajax and the City of Pickering), the geographic Township of Cavan in the County of Peterborough and the geographic Township of Manvers in the City of Kawartha Lakes.
The Town of Cobourg, the Municipality of Port Hope, and the geographic Townships of Hope, Hamilton, Haldimand and Alnwick in the County of Northumberland.
The County of Peterborough (except for the geographic Township of Cavan), the City of Kawartha Lakes (except for the geographic Township of Manvers) and the County of Haliburton.
The County of Prince Edward, the County of Hastings and the Municipality of Trent Hills (formerly the Townships of Seymour, Campbellford, Hastings and Percy) and the Municipality of Cramahe and all lands east thereof in the County of Northumberland.
The County of Lanark, the geographic Townships of South Crosby, Bastard, Kitley, Wolford, Oxford (on Rideau) and South Gower and all lands north thereof in the United Counties of Leeds and Grenville.
The County of Renfrew.
The City of Ottawa and the United Counties of Prescott and Russell.
The District of Nipissing.
The District of Sudbury.
The County of Simcoe and the District Municipality of Muskoka.
The District of Cochrane south of the 50th parallel of latitude.
The District of Temiskaming.
The District of Algoma.
The District of Thunder Bay.
The District of Rainy River.
The District of Kenora including the Patricia portion.
The District of Cochrane north of the 50th parallel of latitude.
The City of Hamilton, the City of Burlington, that portion of the geographic Township of Beverly annexed by North Dumfries Township and that portion of the Town of Milton within the geographic townships of Nassagaweya and Nelson.
The County of Dufferin.
The County of Grey.
The County of Lennox and Addington, the County of Frontenac, and the geographic Townships of Rear Leeds and Lansdowne, Rear of Yonge and Escott, and all lands south thereof in the United Counties of Leeds and Grenville.
The geographic Townships of Elizabethtown, Augusta and Edwardsburgh and all lands south thereof in the United Counties of Leeds and Grenville.
The United Counties of Stormont, Dundas and Glengarry.
The District of Manitoulin.
The District of Parry Sound.
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OLRB Geographic Areas Map
The Ontario Labour Relations Board's 33 construction industry geographic areas cover all of Ontario. The boundaries are set out in the OLRB's official Construction Industry Geographic Areas PDF; this tool turns them into an instant address lookup.
This is the first interactive version of the OLRB's geographic areas. The build required substantial reconciliation work between the OLRB's published descriptions and modern Ontario geography. Edge cases are inevitable; the Report an Error button above sends a pre-filled email so we can investigate.
Disclaimer: This tool is provided for reference purposes only and does not constitute legal advice. Always verify the relevant board area against the OLRB's official area descriptions before filing a certification application or other proceeding. For questions, please email tom [at] courtready.ca.
Common Questions
What source is this map built from?
The map reconciles the OLRB's published Construction Industry Geographic Areas PDF against current Ontario geographic data. If you spot a result that disagrees with your read of the OLRB's source descriptions, please use the Report an Error button above the map so we can investigate.
How does the tool handle areas where the OLRB references historical geographic townships?
Some OLRB area descriptions reference geographic townships that no longer exist as separate municipal entities. The tool reconciles these against current municipal boundaries so that addresses within the historical township boundaries are correctly assigned to the appropriate OLRB area.
What happens if an address falls outside the mapped boundaries?
For an address that geocodes within Ontario but doesn't fall within any mapped polygon, the tool returns the closest area by proximity and labels it as a likely match rather than a confirmed one. For an address outside Ontario, the tool returns no result because the OLRB's geographic areas only cover the province.
Is this an official Ontario Labour Relations Board tool?
No. This is a free Courtready tool built independently. The OLRB's official source document is its Construction Industry Geographic Areas PDF, linked under the Consult Source Map button above the map. Always verify against the official source before relying on the tool's output for a filing.
How do I report an error?
Click the Report an Error button above the map. It opens a pre-filled email with the page URL included, which lets us reproduce the exact view you were looking at. We try to address reported errors within a few business days.
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