Objective : This study aimed to analyze the effects of health-related factors on wellness among older adults residing in the community and to provide foundational data to support successful aging. Methods : The study was conducted over a 17 week period with community-dwelling individuals aged 65 and older. Health-related factors were assessed using the Generic ICF(International Classification of Functioning, Disability and Health) Core Set developed by the World Health Organization(WHO), and wellness was measured using the Korean Wellness Life Style Scale(KWLISS). Of the 174 collected responses, 167 were included in the final analysis, excluding 7 who did incomplete or ineligible cases. The data were analyzed using Pearson's correlation coefficient and multiple linear regression analysis. Results : The correlation analysis revealed significant negative correlations between wellness and body function(r=–.193, p<.05), body structures(r=–.322, p<.001), and activities and social participation (r=–.388, p<.001). In contrast, environmental factors(r=.191, p<.05), educational level(r=.522, p<.001), and economic status(r=.496, p<.001) showed significant positive correlations with wellness. Multiple regression analysis identified activities and social participation (β=–.337, p<.001), educational level (β=.411, p<.001), and economic status (β=.381, p<.001) as significant predictors of wellness, accounting for 52.5% of the variance (R²=.525). Conclusion : Enhancing the wellness of older adults requires a multidimensional approach that strengthens functional independence activities and participation capacities, expands access to educational opportunities, and provides financial support. Accordingly, community-based occupational therapy programs should move beyond narrowly medicalized interventions and adopt integrated models designed to promote older adults' autonomy and engagement in social roles.