Previous research has demonstrated an association between suicidality and sleep, suggesting that sleep disturbances may exacerbate mood dysregulation in participants suffering from mood disorders. The purpose of this study was to investigate the impact of sleep disturbances and insomnia on depression and suicidality in a nontreatment seeking sample of college students. Results indicated that insomnia and nightmares were significant predictors of symptoms of depression, while only nightmares significantly predicted suicidal ideation. Further analysis indicated that participants with elevated scores on insomnia, nightmares, or both experienced differing levels of depression and suicidal ideation. Future directions and treatment implications are discussed.