This study explores the impact of community service on students' personality development, with a focus on the mediating role of mentorship experiences. Drawing upon theoretical frameworks such as Social Learning Theory and Self-Determination Theory, the research investigates how structured community engagement, particularly within the National Service Scheme (NSS), enhances traits like empathy, leadership, and emotional intelligence. Data were collected from 449 NSS volunteers across higher education institutions and higher secondary schools in Palakkad district, Kerala. Utilizing validated scales and structural equation modeling, the study confirms that both community service and mentorship significantly influence personality development. Moreover, mentorship is found to partially mediate this relationship, amplifying the benefits of community involvement. These findings underscore the importance of integrating quality mentorship into community service programs to foster well-rounded personal growth in students.