Suicide is now the third leading cause of death among adolescents in the United States, and some studies suggest that as many as 75 percent of all teenagers have considered killing themselves. Current research on young people who are suicidal (those who attempt and those who succeed) is discussed in a plain way. Among the wide ranging topics covered are the prevalence of adolescent suicide, racial and gender differences, methods used in the study of suicidal behavior, associated behavioral problems (e.g., drugs and alcohol), psychological profiles, precipitating events for suicide attempts, teenage suicide clusters, the effects of suicide on family and friends, the treatment of suicidal adolescents, and, most importantly, strategies for intervention and prevention.