Objective: Describe and synthesise existing published research on the experiences and support needs of informal caregivers of people with multimorbidity. Design: Scoping literature review. Primary database and secondary searches for qualitative and/or quantitative English-language research with an explicit focus on informal carers of people with multimorbidity (no date restrictions). Quality appraisal of included papers. Thematic analysis to identify key themes in the findings of included papers.