This research is motivated by the importance of social support in helping new students navigate the transition and adaptation period in the university environment, thereby improving their psychological well-being. This study aims to determine the level of psychological well-being, the level of social support, and the influence of social support on the psychological well-being of new students in the Guidance and Counseling Study Program at Sanata Dharma University in 2025. The study used a quantitative approach with a population-based research method involving all new students in 2025. Data were collected using a validated Likert-scale questionnaire. The results showed that social support was categorized as moderate (74%) and low (26%), absent, while psychological well-being was categorized as moderate (49%), low (46%), and very low (5%). Regression analysis showed that social support had a positive and significant effect on psychological well-being (p = 0.000; R² = 20.3%), thus the alternative hypothesis (Ha) was accepted. Keywords: social support, psychological well-being, new students
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