Objectives: The prevalence of ageing patients in forensic psychiatric settings is increasing. However, limited research has reported around this population. The aim of this scoping review is to synthesise the current evidence around ageing forensic psychiatric patients. Methods: The literature was searched through four databases and Google searches. The identified outputs were screened for suitability and assessed for quality. Quantitative data were extracted and analysed on SPSS; qualitative data were extracted and analysed onto NVivo. Results: Seven studies were included in the review. Quantitative results reported around demographics, service contact, offending patterns, mental, and physical health of ageing patients. Qualitative findings focused on age-friendliness of services, staff-patient rapport, activities, security issues, and discharge planning. Conclusions: Ageing forensic psychiatric patients present with complex and unique needs in relation to treatment, activities, mental, physical, and support. Further research looking at individual patients' needs is paramount to inform policy development and good practice in this area.