eng Enviro Research Publishers Current Research in Nutrition and Food Science Journal 2347-467X 2322-0007 2024-08-30 12 2 605 618 10.12944/CRNFSJ.12.2.10 20152 article Joo-Eun Lee 1 Department of Food and Nutrition, Seowon University. Cheongju City, South Korea This study analyzed the raw data from the 2021 National Health and Nutrition Survey conducted annually in Korea to investigate the dietary behavior, nutrient intake, and health-related quality of life of the elderly in the community based on their household type: single-person, couple, or non-couple family household. As a result of the study, based on the household type, significant differences were found in the frequency of breakfast, lunch, and dinner, as well as in the frequency of consuming vegetables and fruits (P<0.05, P<0.01, P<0.001). After analyzing the impact of household type on the depression and happiness levels of the surveyed elderly, it was found that the depression levels of elderly individuals in single-person households were significantly 1.279 times higher, while their feelings of happiness were 0.561 times lower compared to elderly individuals living with their family, including a spouse (P<0.05, P<0.001). In order to enhance the health-related quality of life for elderly individuals living alone with low income and education levels, it is essential to provide systematic management and support activities. https://www.foodandnutritionjournal.org/volume12number2/comparison-of-dietary-behaviors-and-health-related-quality-of-life-of-the-elderly-based-on-their-household-type-in-korea/ Dietary behavior Elderly Nutrient Quality of life Single-person household