<sec> <b>Objectives</b> <p>This study aimed to examine how social activity (SA) moderates the relationship between age norms (AN) and subjective health status (SHS) among older adults in Korea. Based on the theories of age-integrated structure and active aging, the proposed hypotheses were that SHS has a positive association with attitudes towards AN, and with the interactions between different types of AN and SA.</p></sec> <sec> <b>Methods</b> <p>Cross-sectional data from a Korean national survey of older adults were analyzed. Participants were older adults <italic>N</italic> = 10,451, of whom 10,280 were used in the study sample. Multivariate linear regression including interaction terms, was used to examine the associations among SHS, AN, and SA.</p></sec> <sec> <b>Results</b> <p>The results of multivariate linear regression examining learning (ß = 0.066, <italic>p</italic> &lt; 0.001), working (ß = 0.063, <italic>p</italic> &lt; 0.001), and remarriage (ß = 0.036, <italic>p</italic> &lt; 0.001) showed that those who perceived AN more positively, were more likely to have a high SHS. With interaction terms, those who had a positive attitude towards AN for learning and volunteering (ß = 0.025, <italic>p</italic> &lt; 0.05), and remarriage and engaged in friendship groups (ß = 0.032, <italic>p</italic> &lt; 0.05) were more likely to have a high SHS.</p></sec> <sec> <b>Conclusion</b> <p>SA serves as a great moderator between AN and SHS.</p></sec>