This descriptive-correlational study focuses in determining the effectiveness of study habits among grade 9 students at Can-avid National High School. The study utilizes a Likert-Scale type of Questionnaire which were all related on the effectiveness of study habits to the grade 9 students adapted by the researchers from the developer Dr. B.V. Pavel “The Study Habit Inventory” while Grade Weighted Average of the respondents for the first quarter of S.Y. 2025-2026 was used to determine the academic performance. After the data was gathered, the researchers used percentage and Pearson-moment product correlation coefficient to determine the relationship between the two variables. The study concluded that there is a relationship between Study Habits and Academic Performance of Grade 9 students at Can-avid National High School. Therefore, the null hypothesis has been rejected and the alternative hypothesis was accepted. Furthermore, the relationship between Study Habits and Academic Performance of Grade 9 students resulted to 0.002 value of Person r Product which denotes a relationship between Study Habits and Academic Performance. Recommendations are made for educators and parents to identify and foster effective study habits among students to promote their educational attainment.