The aim of this scoping review was to establish the breadth of the academic literature regarding the barriers and facilitators to social work practice in schools as perceived by School Social Workers (SSWs). Following the PRISMA-ScR Scoping Review Framework, 42 articles were identified as meeting the inclusion criteria. Five interrelated themes related to the barriers and facilitators to SSW practice were identified: (1) Inadequacy of service delivery infrastructure; (2) SSWs’ role ambiguities and expectations; (3) SSWs’ competency, knowledge and support; (4) School climate and context; and (5) Cultivating relationships and engagement. This scoping review found that social workers perceive far greater barriers than facilitators when delivering services in school settings, with limited evidence related to the facilitators that enhance School Social Work (SSW) practice. Further research regarding the facilitators of SSW practice is needed, specifically in countries where research on this topic is emergent.