The aim of this study is to examine the influence of character education and environmental knowledge on students' awareness and support for sustainability initiatives in a university environment. The research employs a quantitative methodology to collect data from a range of student cohorts enrolled in different academic programs at Sanata Dharma University. The study utilizes a questionnaire survey as the data collection tool to assess the major variables being investigated. The poll used a Likert scale to evaluate the extent to which pupils have been exposed to character education, specifically through the Formasi Cerdas Humanis curriculum. Additionally, it assesses their proficiency in environmental knowledge and their awareness of the importance of fostering sustainability within the context of the university. The study population consists of 280 individuals who are enrolled at Sanata Dharma University. The data analysis procedure entails the application of multiple linear regression analysis, which is executed through the employment of SPSS software. The research findings indicate that there exists a moderately positive correlation between character education, environmental comprehension, and student consciousness regarding the endorsement of sustainability initiatives within the institution. Additionally, the dominance test conducted in this study indicates that environmental information exerts a marginally greater impact on student awareness and endorsement of sustainability programs compared to character education.