Although Multi-Tiered Systems of Support (MTSS) has been used in schools, its success has prompted recommendations for its adoption in group home and day habilitation settings. This scoping review examines the literature on implementing MTSS in group home and day habilitation settings for individuals with intellectual and developmental disabilities. Of the 15 studies reviewed, most focused on Positive Behavior Interventions and Supports (PBIS) rather than a comprehensive MTSS framework, raising questions about the alignment of interventions with the three-tiered structure of MTSS. Additionally, PBIS in these settings appears restricted to an individualized approach to minimizing behavior instead of the comprehensive framework used in schools. Benefits of implementing PBIS include a reduction in challenging behavior, decreased use of restrictive interventions, and staff-related advantages such as improved organization and reduced turnover. Challenges are noted in time and resource constraints. Suggestions for implementing MTSS in residential and day habilitation settings are provided.