Background and objective Sleep hygiene are behaviours that are believed to promote improved quantity and quality of sleep, measured through the use of sleep hygiene index. Students who achieve their sleep needs are more academically successful, as reflected by their GPA. This study aims to identify and analyze the correlation of sleep hygiene with the grade point average value. Methods This study used an observational research design with cross-sectional data collection methods to find the correlation of sleep hygiene index with grade point average value. Sample collection was done by random sampling technique on medical university students class of 2019. The study was conducted from September 2022 to December 2022. The data obtained were analyzed through SPSS, to find the correlation of sleep hygiene with grade point average value. Results There were 160 students, mostly of which are 21-year-olds, female, and Muslims. Across the many different sociodemographic background, moderate sleep hygiene index was the most dominant sleep hygiene index. After analyzation, it was found that sleep hygiene correlates with grade point average (ρ = -0.372). Conclusion Sleep hygiene correlates with grade point average. Poor sleep hygiene is correlated with lower GPA value, and vice versa with better sleep hygiene correlating with higher GPA value. students should aim to change any poor sleeping hygiene bearing in mind that poor sleep hygiene does have a correlation on academic achievement, reflected through their grade point average.