Objective: To evaluate whether collegiate athletes and nonathlete college students differ in nonsuicidal self-injury (NSSI), suicidal ideation, suicide attempt, and help-seeking behaviors. Participants: 165,210 respondents to the American College Health Association's National College Health Assessment (NCHA), a survey administered to college students by participating institutions during Fall 2011 to Spring 2015. Methods: Single-level binary logistic regression with equality of coefficients tests and chi-square analyses. Results: The models for NSSI and suicide attempt differed slightly between student-athletes and nonathletes. Most notably, stress is a stronger correlate of NSSI (Z=3.03, p < 0.01) for nonathletes while difficulties with social relationships is a stronger correlate of suicide attempt for student-athletes (Z=-3.13, p < 0.01). Conclusion: Our findings highlight the salience of relationship problems as a correlate with suicide attempts in student-athletes. Difficulty in romantic or other social relationships could be a marker of risk or an identifiable, actionable target for preventing future suicidal behaviors among collegiate athletes.