Children with intellectual and developmental disabilities are often over-represented in child protection and out-of-home care services. Despite this fact, little is known or understood about their experiences with these services. This scoping review seeks to identify the published literature about children with intellectual and developmental disabilities who are engaged with child protection and out-of-home care services. Findings from the 18 studies included in this review show that these children are at increased risk of entering the child protection and out-of-home care system, with outcomes that do not fare as favourably as their nondisabled peers. This is largely due to a lack of support, training, and resources for the children, their families, and carers. Placement failure was a common theme with residential care more likely for children with greater complexity and support needs. These children are understudied, with more research needed to better understand the factors that contribute to their experiences. Greater insights into how a child protection and out-of-home care pathway can be avoided, via the provision of adequate services and supports, are also urgently needed so that fewer children are placed at risk in a system where poor outcomes are common.