ABSTRACTObjectives: The aim of this study was to investigate the prevalence of depression among very old individuals with dementia compared to those without dementia and to examine if there were any differences regarding associated factors between people with or without depression in these conditions.Methods: In a population-based study in Sweden, 363 participants aged 85 years and above, were evaluated for depression and dementia.Results: The prevalence of depression was significantly higher among the people with dementia than without dementia, 43% vs. 24% (p