Founded in 1973, the Ontario Nurses’ Association (ONA) is the trade union that represents 59,000 registered nurses and allied health professionals working throughout Ontario, including:
•hospitals
•community health
•long-term care
•public health
•clinics
•industry

Each facility represented by ONA has a Bargaining Unit President that oversees union activities within that facility. The provincial organization is divided into Locals, which is headed by a Local Coordinator. Bargaining Unit Presidents as well as Local Coordinators are ONA members, and are members' best source of information as it pertains to their facility.

ONA works in collaboration with other unions and maintains strong links with other nurses’ unions in Canada. ONA is a member of the Canadian Federation of Nurses Unions (CFNU), and thereby affiliated with the Canadian Labour Congress (CLC).

The Ontario Nurses’ Association (ONA) is a proactive union committed to improving the economic welfare and quality of work-life for our members, to enable them to provide high-quality health care.