During the COVID-19 pandemic, the well-being of older adults has been highlighted as a significant public health concern. In this study, we investigated the role of psychological resilience in mediating the relationship between positive self-perceptions of aging (SPA) and the subjective well-being (SWB) of community-dwelling older adults in Taiwan during the pandemic. We collected data through face-to-face interviews conducted from October 2021 to February 2022, involving 1,095 participants aged 50 years or above residing in a southern city in Taiwan. More than half of the study participants were female, aged 65 or older, and had less than a high school education. More than two thirds were married and/or living with partners. More than a third had two or more noncommunicable diseases. We calculated scores for SWB, positive SPA, and psychological resilience and examined correlations among the outcome and predictor variables. Our findings indicated that higher positive SPA was significantly associated with better SWB among community-dwelling older adults in Taiwan and that this association was mediated by psychological resilience. Specifically, after controlling for covariates, structural equation modeling (SEM) analysis revealed a significant main effect of positive SPA on SWB (b = 0.412, β = 0187, and p < 0.001), while bootstrap mediation analysis showed a statistically significant indirect mediating effect from positive SPA on SWB via psychological resilience (0.597, 95% bootstrap CIs = [0.445, 0.749], and p < 0.001). These findings highlight the potential importance of cultivating positive self-perceptions of aging and implementing resilience-centered interventions to promote well-being among Chinese older adults in the community.