The development of self-determination is promoted by supportive contexts during adolescence; families are a key part of this context. In adolescent populations, research suggests families can support self-determination in a number of ways, yet less is known about how self-determination is promoted within families of youth with intellectual and developmental disabilities (IDD). To address this knowledge gap, we conducted a scoping review to examine the existing evidence pertaining to the role families of youth with IDD play in supporting the development of self-determination. A review of 24 publications revealed that existing research has focused on understanding family perspectives on self-determination, but there is a lack of studies investigating how families provide supports for self-determination in the home context for youth with IDD. Additionally, little intervention work has focused on supporting families to promote self-determination. Based on the findings, implications for future research and practice are provided.