This study aims to identify the effects of daily life changes due to the coronavirus disease 2019 pandemic on the depressive symptoms among community-dwelling older adults. This cross-sectional and secondary data analysis study collected and analysed the data of 72 335 older adults aged older than 65 who participated in the 2020 Korean Community Health Survey. Changes in daily life due to the coronavirus disease 2019 pandemic were measured by changes in physical activity, sleep duration, consumption of instant foods or soda drinks, alcohol consumption, smoking, and social contact compared to before the pandemic as perceived by the participants. The Patient Health Questionnaire-9 was used to assess depressive symptoms, and multiple logistic regression analysis was conducted to explore the relationship between the two. After adjusting for socio-demographic and health-related factors, changes in daily life due to the coronavirus disease 2019 pandemic that affected depressive symptoms in older adults living in the community were observed. This study confirmed that changes in daily life due to the coronavirus disease 2019 pandemic negatively affected the mental health of older adults. Thus, there is a need to improve social support and care systems, by including non-face-to-face programmes using remote communication technology. It will allow older adults to maintain their daily lives and mental health during the COVID-19 pandemic.