The difficulties experienced by dementia patients significantly affect the daily lives of patients and their families. The incidence of Alzheimer's disease, one of the most common diseases associated with dementia, is increasing. For this reason, raising awareness about dementia is of critical importance in terms of early diagnosis, treatment, care, behavior and attitudes towards individuals with dementia. Material and Methods: This cross-sectional study aims to determine whether being young or old makes a difference in the level of knowledge about dementia. For this purpose, a questionnaire consisting of 2 parts was developed. A total of 800 people, consisting of young (20-39) and older (65+) individuals, participated in the study. Data from the study were analyzed using t-test and analysis of variance. Results: The results do not show that there is a significant agerelated difference in the level of knowledge about dementia. However, when age, gender, marital status and education were added, significant differences were found between the groups. When the difference between the knowledge levels of the participants according to age and gender was compared, it was found that older women scored higher than older men, and this difference was statistically significant. Conclusion: Having adequate information on dementia and related diseases is important for early diagnosis and the positive attitude and awareness of individuals and caregivers towards patients with dementia and Alzheimer's. In general, although the level of knowledge about dementia is not very low, it is recommended to organize formal education and awareness programs to increase awareness.