There is a pressing need for the development of programs for the early identification and treatment of depression in individuals with mild intellectual disability. The aim of this study was to ascertain the perspective of 64 key stakeholders (people with intellectual disability, healthcare professionals, family/caregivers & support workers) regarding the risk factors and characteristics of depression, the support and service needs of individuals with intellectual disability/depression and those who care for them. Findings enhance our understanding of depression and its risk factors in people with mild intellectual disability and endorse the need for the development of screening and intervention programs suitable for delivery by staff in agencies providing services to people with mild intellectual disability.