Background: Suicidality in individuals with intellectual disability is a critical but under-researched area. This systematic review aims to synthesize existing literature on the prevalence, risk factors, and interventions for suicidality among individuals with intellectual disability. Methods: Adhering to the PRISMA guidelines, a comprehensive review of databases was conducted for empirical studies on suicidality in intellectual disability. Data were extracted on sample characteristics, methodologies, and key findings. Results: Nineteen studies met the inclusion criteria. Consistent risk factors, notably comorbid psychiatric disorders, emerged. Passive suicide methods predominated with a positive correlation between higher intellectual functioning and increased suicidal behaviors. Conclusions: The increased vulnerability to suicide in this population highlights the need for targeted interventions and comprehensive risk assessments. Much future research is required in the face of paucity of data with the priority on developing specific suicide prevention tools while addressing cultural stigmas to enhance support for this population.