Ontario Employer-Union Collective Agreement Inventory

An inventory of employer and union relationships in Ontario, including names, agreement dates, employee counts, and industry classifications. The data is filed under Section 90 of the Labour Relations Act and is available via the Ministry's e-Library Portal.

Use Cases

• Analyze collective agreement start and expiry dates to study bargaining cycle patterns across industries.
• Examine the number of employees covered per agreement to assess the scale of labor representation.
• Map employer and union names by industry and sector to understand relationship networks.
• Use labour legislation classifications to filter and compare agreements by regulatory framework.

Strengths

• Data is mandated for filing under Section 90 of the Labour Relations Act, ensuring a legal foundation for collection.
• Includes multiple key relationship attributes: employer name, union name, start date, expiry date, and industry.

Limitations

• The dataset is a listing of filed agreements and is explicitly noted as not comprehensive, with potential for amendments, errors, or omissions.
• Key quantitative metrics like total row count and file size are unknown, limiting initial assessment of scale.

Provenance

Source

Ministry of Labour, Immigration, Training and Skills Development, Government of Ontario.

Collection Method

Collective agreements filed with the Minister as required by law, gathered for the Labour Relations Collective Agreements e-Library Portal.

Time Range

null

Freshness

Last updated 2026-03 -18.

Geography

Ontario, Canada.