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There is a significant gap in understanding the epidemiology in community settings. This systematic review aimed to estimate the prevalence and incidence of delirium in community\u2010dwelling people with dementia. Medline, Embase, PsychINFO, Scopus, Web of Science, CINAHL, and Cochrane databases were searched from inception to January 6, 2025. Articles published in peer\u2010reviewed journals that focused on the prevalence, incidence, or occurrence of DSD were included. Twenty\u2010seven studies met the inclusion criteria. The overall pooled prevalence of DSD was 30.2%, with a sensitivity analysis of 27.7%. Prevalence varied by country, setting, and tool used for case ascertainment. Our prevalence findings align with previous research but indicate a higher\u2010than\u2010expected rate of DSD in community settings compared to what may be seen in practice. 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