The rapid expansion of social commerce has transformed the manner in which consumers interact with brands and make purchasing decisions. Influencers have emerged as powerful intermediaries who shape consumer perceptions, trust, and purchase behavior through social media platforms. This study examines the role of influencer trust in influencing online buying decisions within social commerce environments. Data were collected from 530 social media users and analyzed using descriptive statistics, correlation analysis, multicollinearity diagnostics, logistic regression, hierarchical regression, and Receiver Operating Characteristic (ROC) analysis. The findings indicate that consumers exhibit moderate levels of trust toward influencers, perceive influencers as credible and authentic sources of information, and demonstrate moderate purchase intentions. Logistic regression results revealed that purchase intention significantly predicts online buying decisions, whereas hierarchical regression findings suggest that influencer trust alone does not directly explain additional variance in purchase intention beyond demographic characteristics. The results highlight the complex mechanisms through which influencer-related factors contribute to consumer decision-making processes. The study contributes to the growing body of literature on social commerce and provides practical implications for marketers, brands, and digital content creators.