IntroductionAgeing in place, supported by formal home and community services and informal caregivers, is the most used long-term care option for people with dementia (PwD). Informal caregivers are inundated by their caregiving responsibilities and resultantly suffer consequences. Despite the multitude of clinical effectiveness studies on interventions that support informal caregivers, there is a paucity of information regarding their implementation process. This scoping review aims to identify the implementation strategies, implementation outcomes, and barriers and facilitators that impede or support the dissemination and uptake of interventions that support informal caregivers of PwD at home.Methods and analysisThis protocol is guided by the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) Protocols, and the scoping review will follow the systematic steps of the PRISMA-Extension for Scoping Reviews guideline. The search strategy will include publications produced from inception to 8 March 2021 and will be conducted in the search engines Embase, Medline (Ovid), Web of Science and Cochrane Central Register of Controlled Trials (Wiley), followed by a three-stage approach. First, title and abstracts will be screened by two independent reviewers. Second, full-text articles will also be screened by both reviewers and, in case of disagreement, by a third reviewer. The first two stages are based on a set of inclusion and exclusion criteria. Reference lists of the final included studies will also be checked for relevant articles. Data from the final included studies will be extracted and synthesised using the Expert Recommendations for Implementing Change compilation and Proctor’s implementation outcomes to ensure homogenous and standardised reporting of implementation information.Ethics and disseminationThe review findings will be published in a peer-reviewed journal and disseminated at geriatric and implementation conferences to inform researchers, health service planners and practice professionals with an overview of the existing literature to guide them in the effective implementation of caregiver-focused interventions in dementia support.