From a nationwide study of 830 white, emotionally disturbed adolescents, ages 12 to 18, three samples were selected for study. One consisted of all boys (N = 31) and girls (N = 67) referred for treatment after suicide attempts. The second included those boys (N = 7) and girls (N = 22) referred for suicidal thoughts and threats, as well as suicide attempts. The third was comprised of those boys (N = 13) and girls (N = 12) referred for suicidal thoughts and threats, but who had made no known suicide attempts. Both self- and psychotherapist ratings on 1,250 variables were examined by comparing the endorsement rates for boys and girls in each criterion group separately with those of the remaining sample of distrubed adolescents who had not been referred for suicidal behavior. Our results confirm some past findings and introduce a large number of new correlates of adolescent suicidal behavior. They indicate that there is little difference between teenagers who attempt suicide and those who think about it or threaten it. The findings also highlight the necessity of studying the sexes separately.