This self-report questionnaire study was carried out in Al-Hassa, Saudi Arabia to highlight the magnitude, predictors, and circumstances of workplace violence against primary health care (PHC) workers. A total of 1,091 workers completed a self-administered questionnaire. About 28 percent were exposed to at least one violent event during the past year. Logistic regression analysis revealed that the most important predictors of violence are high education of workers (OR = 9.3), working in emergency clinics (OR = 6.8), and in Hegar (OR = 3.2). Emotional and physical violence accounted for 92.1 percent and 7.9 percent of violent events, respectively. Unmet needs of patients, overcrowding, and reaction to injury or illness were the leading contributing factors for violence. There is a need for violence prevention and control program in health care facilities. (Published Abstract)