This research explores how study habits affect the academic performance of high school students in Mizoram, India. Using a descriptive survey design, the study adopted a stratified random technique and schools were taken as the unit for sample selection. Accordingly, 600 students were included from a random selection of 48 schools. The ‘Study Habits Inventory’ developed by M.N. Palsane and Anuradha Sharma was used to collect the data, whereas the percentage of marks obtained by the students in their previous class was considered as their academic achievement. The findings of the study revealed that the study habits of children differed significantly with regard to gender and the type of management, favoring the female and private school students, respectively. However, a significant difference was not found in comparison between rural and urban school students in relation to their study habits. The study also concluded that study habits had a significant impact student’s academic achievement.