This study investigated a sample of 325 suburban high school students’ knowledge of suicidal peers, whether they had talked to a suicidal peer &, if so, what they did. 68% of the females & 42.5% of the males reported knowing a teen who had committed or attempted suicide. 63% of 97 students who knew a peer who was definitely considering suicide talked to them, 25% told an adult, & 12% did nothing. Results reinforce the importance of adolescents themselves in suicide prevention.