The paper outlines the magnitude of the problem and examines various sources to show the prevalence of workplace violence in Canada. It discusses risk factors, looks towards prevention from program and legislative perspectives, and summarizes unions' efforts to address the problem. Risk factors for workplace violence include working with the public; handling money; being seen by the public to be in a position of power, for example enforcing laws or inspecting premises; working alone; and providing health care to ill or aged persons. A number of unions and central labor bodies recommend, among other actions, mandatory training for health and safety representatives, to cover violence against women, causes of violence and aggression, how to recognize potential violence, dealing with specific situations, and debriefing, support, and follow-up after incidents of violence. The paper also describes legislation that could help prevent workplace violence and/or mitigate the effects of such incidents. Notes