Objective: This study explored whether specific dimensions of spiritual well-being (religious well-being and existential well-being) relate to reduced suicidal ideation, and whether associations persisted after controlling for religiosity and psychosocial variables associated with suicide. Participants: Participants were 457 college students who completed measures that assessed spiritual well-being, religiosity, hopelessness, depression, social support, and suicidal ideation. Methods: The authors used linear regression modeling to assess religious and spiritual correlates of suicidal ideation. Results: After controlling for demographic variables and psychosocial factors, neither involvement in organized religion nor religious well-being significantly contributed to suicidal ideation. However, even after controlling for significant correlates, existential well-being remained a significant predictor of suicidal ideation. Conclusions: This investigation highlighted existential well-being as an important factor associated with lower levels of suicidal ideation among college students. Findings from this study focusing on the association between spiritual well-being and suicidality may prove especially beneficial to suicide prevention efforts. (Contains 4 tables.)