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Abstract Background The number of people living with dementia in Malaysia is expected to increase with the nation’s growing elderly population and increased lifespan. The lack of public awareness of dementia is partly compounded by low personal health literacy, while scarce research on local patient awareness further impacts the execution of optimised healthcare services in Malaysia. Patients with chronic disease have an elevated risk of developing mild cognitive impairment (MCI). This study aimed to assess the level of awareness of basic knowledge on dementia among the elderly, especially those at risk of developing mild cognitive impairment and its associated factors. Methods A total of 207 elderly patients aged 60 years and above with chronic diseases attending a university-based primary care clinic were recruited via a systematic randomised sampling method from the clinic patient attendance registry. Respondents were assessed using self-administered online questionnaires distributed via mobile devices. The questionnaire assessed awareness, i.e. ability to correctly answer a self-reported questionnaire on basic dementia knowledge; (adapted from Northern Ireland Life and Times Survey 2010), risk of MCI; (using Towards Useful Aging (TUA)-WELLNESS screening questionnaire) and help-seeking behaviour. Bivariate analysis was used to determine factors associated with dementia awareness. Results The response rate was 77.1%, with the majority of participants were females, Chinese and had secondary school education. 39.1% of participants were categorised as high risk of developing MCI. The majority (92.8%) had low dementia awareness and had never shared their concerns regarding dementia (93.2%) nor had any discussion (87.0%) on cognitive impairment with their physicians. Three factors had an association with total dementia awareness score, i.e., younger age group, higher risk of MCI and presence of cardiovascular diseases have significantly lower awareness score (p