Most RTO/ERO members live in Ontario and are affiliated with one of over 40 Districts into which the organization is divided. Approximately 750 members live in other parts of Canada or outside Canada and maintain an association with the Ontario area in which they taught. The majority of these members are affiliated with the RTO/ERO District in British Columbia.

Within each District members participate in social, travel and entertainment opportunities, become involved in political activities, and some assume leadership roles on District Executives.

Approximately three-quarters of RTO/ERO's Districts have their own websites, with many others currently in development.