Individuals diagnosed with borderline personality disorder (BPD) are at an elevated risk for engaging in self-injurious behaviors, including suicide, attempted suicide, and nonsuicidal self-injury (NSSI). The purpose of this chapter is to provide an overview of research on self-injurious behaviors among individuals with BPD. Definitions and prevalence rates are provided for NSSI, suicide, and attempted suicide. Clinical correlates of and risk factors for the behaviors, as well as associations between specific BPD criteria and self-injurious behaviors, are discussed, and a brief overview of treatments focused on reducing self-injurious behaviors among BPD patients is provided. By understanding risk factors for attempted suicide and NSSI in BPD, we can better identify patients who are at increased risk and focus treatment efforts on addressing modifiable risk factors.