Our vision is empowered members taking collective action for safe, equitable workplaces and high-quality health care for all Ontarians. Our mission at ONA is to defend the rights of and advocate for nurses and health-care professionals who care for the health of Ontarians. ONA is the union representing 68,000 ONA registered nurses and health-care professionals, as well as 18,000 nursing student affiliates, providing care in hospitals, long-term care facilities, public health, the community, clinics and industry.