Objective-To examine suicidal ideation, suicide attempts, lethality of suicide attempts, and the relationship between psychiatric disorder and recent attempts in newly detained juveniles.Methods-The sample included 1829 juveniles, aged 10 to 18 years, sampled after intake to a detention center in Chicago, IL. Interviewers administered the Diagnostic Interview Schedule for Children (DISC) to assess for thoughts of death, suicidal ideation, suicide plans, lifetime suicide attempts, number of attempts, age at first attempt, attempts within the last 6 months, method of suicide attempts, and psychiatric disorder.Results-More than one-third of juvenile detainees and nearly half of females had felt hopeless or thought about death in the 6 months prior to detention. Approximately 1 of 10 (10.3%, CI: 7.7% -12.8%) juvenile detainees had thought about committing suicide in the past 6 months, and 1 of 10 (11.0%, CI: 8.3% -13.7%) had ever attempted suicide. Recent suicide attempts were most prevalent in females and youth with major depression and generalized anxiety disorder.Conclusions-Fewer than half of detainees with recent thoughts of suicide had told anyone about their ideation. Identifying youth at risk for suicide --especially those suffering from depressive and anxiety disorders --is a crucial step to preventing suicide.