The Ontario Association of Social Workers (OASW) is the voice of social workers in Ontario. OASW is a voluntary, provincial, non-profit bilingual association for social workers. All practising members have a university degree in social work at the bachelor's, master's or doctoral level.

Incorporated in 1964, OASW has over 3,400 members and 15 branches across the province. Furthermore, it is one of the 10 provincial/territorial associations of social workers belonging to the Canadian Association of Social Workers which is, in turn, a member of the 78-nation International Federation of Social Workers.

OASW speaks on behalf of the interests and concerns of social workers. OASW advocates for the improvement of social policies and programs directly affecting social work clients and social work practice, develops guidelines for professional practice, publishes a provincial newsmagazine and numerous branch newsletters, and provides direct services to its members.

OASW members practise in accordance with the profession's Code of Ethics.

OASW does not provide services to the public - if you require services, click on  Find A Social Worker .