In the past 20 years, the incidence of anorexia nervosa (AN) in industrialized countries has remained stable at 4.2–7.7 new cases per 100,000 per year. During this period, the incidence of bulimia nervosa (BN) has decreased from 12.2 to 6.1 per 100,000. The lifetime prevalence of AN in females in the United States in the past decade was 0.9% and 0.3% in males, and that of BN was 0.88% in females and 0.12% in males in a European study. Binge eating disorder (BED) is the most common eating disorder (ED), with a lifetime prevalence of 3.5% in women in the United States and 2.0% in men. AN has the highest standardized mortality rate of 5.86, followed by BN with a standardized mortality rate of 2.29. Less than half of AN patients have a full recovery, compared to two-thirds of BN patients who recover. The prevalence of EDs is increasing in the Middle East and Asian countries, as well as among Latinos, African-Americans, and Asians in the United States. Body dissatisfaction and a family history of ED are consistent risk factors across all EDs. Perfectionism is a greater risk factor for restricting AN and conduct disorders, and substance abuse and sexual abuse are risk factors for BN and BED. ED prevention programmes have mainly targeted at-risk persons in specific age groups and environments. Both Internet-based and group session programmes have reduced ED-related symptoms. There are multiple issues concerning the implementation and maintenance of prevention programmes, including clinician training, costs, attrition rate, and effectiveness over time.